RT1: The Missing "that" Between Two Nouns

Here is the first of the six Reduction Transformations, and the gentlest: RT1. It's a deletion you already make every day without noticing, saying the book I read instead of the book that I read. When two noun phrases sit side by side with no link between them, a relative marker (that / which / whom) has usually been dropped. This post teaches you to spot the gap and restore it, the perfect easy start to the advanced section.

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1. The everyday deletion you already make

Read these two sentences. Both are correct, and both mean the same thing:

• The book that I read was helpful. (full)
• The book I read was helpful. (squeezed, that deleted)

English speakers say the second one constantly. We drop the that (or which or whom) without thinking. So RT1 is the gentlest reduction; you already produce it naturally. The skill here is just to consciously recognize it when reading, and to restore the deleted word so the structure is clear.

That deleted word, that, which, or whom, is a relative marker (remember relative clauses from The M5 Zone: Full Describing Clauses (a Major Milestone)?). RT1 is simply the deletion of a relative marker, and your job is to restore it.

Quick recap: RT1 is the gentlest reduction: a relative marker (that/which/whom) is deleted. The book that I read → The book I read. You already do this naturally; the skill is to recognize and restore it when reading.

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2. The trigger: two noun phrases sitting side by side

How do you spot RT1? Look for this warning sign:

TWO noun phrases appear right next to each other, with no linking word between them, and the main verb comes later.

Look at The book I read was helpful:

• The book = noun phrase #1
• I = noun phrase #2 (a pronoun is a noun phrase!)
• These two NPs are right next to each other, with nothing between them.
• The main verb (was helpful) comes later.

That adjacency is suspicious! English normally does NOT allow two full noun phrases to sit side by side with no structural link. So when you see [noun phrase] [noun phrase] with nothing between them, your alarm should go off: a relative marker has probably been deleted between them.

More examples of the two-NP warning sign:

• The person we met... → The person + we (two NPs adjacent)
• The idea the committee rejected... → The idea + the committee (two NPs adjacent)
• The town my grandfather described... → The town + my grandfather (two NPs adjacent)

In each, two noun phrases sit together with no link, the signal of RT1.

Worth repeating: The RT1 trigger: TWO noun phrases sit side by side with NO linking word, and the main verb comes later. English doesn't allow adjacent NPs with no link, so a relative marker was deleted between them. The book | I | read... (two NPs adjacent).

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3. The restoration: insert the relative marker

To restore RT1, simply insert the deleted relative marker between the two noun phrases. Which marker? It depends on what the first noun refers to:

Watch the restoration:

• The book I read was helpful. → The book which I read was helpful. (book = thing → which)
• The man my sister saw was a doctor. → The man whom my sister saw was a doctor. (man = person → whom)
• The recipe my mother gave me is easy. → The recipe that my mother gave me is easy. (that works for either)

Once you insert the marker, the structure becomes crystal clear: the second NP starts a relative clause describing the first NP. The book [which I read] was helpful: now you can see that which I read describes the book, and the main verb is was helpful.

Lock this in: To restore RT1, insert the relative marker between the two NPs: whom for a person, which for a thing, that for either. The book I read → The book which I read. The second NP starts a relative clause describing the first.

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4. Why only the OBJECT marker can be deleted

Here's an important detail. RT1 only deletes the relative marker when that marker is the object inside the relative clause, not the subject.

Let me explain with a comparison:

• the book [that] I read → here that is the object of read (I read what?, the book/that). The object marker CAN be deleted → the book I read. ✓
• the book that fell → here that is the subject of fell (what fell?, the book/that). The subject marker CANNOT be deleted. You can't say the book fell meaning "the book that fell", that would be a different (complete) sentence!

So the test for RT1: after the two adjacent NPs, is there a verb that needs an object? If the deleted marker was playing the object role, RT1 applies. (If the marker was the subject, you'd get RT2 instead, the next reduction, which deletes the subject marker plus a be.)

Don't worry too much about this distinction right now, the two-NP-adjacency signal is reliable enough. Just know: RT1 restores an object relative marker, and the giveaway is two full noun phrases sitting next to each other.

A quick reminder: RT1 deletes only the OBJECT relative marker (the book [that] I read, that is the object of read). A SUBJECT marker can't be deleted this way. The two-adjacent-NPs signal reliably points to RT1.

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5. Don't over-apply RT1

A word of caution. Not every pair of nearby nouns is an RT1 reduction. Sometimes the second noun genuinely starts a new, complete clause. So before restoring, check:

Does inserting a relative marker make the sentence make sense? If yes → RT1 applies. If the second NP clearly begins its own complete clause with its own subject and verb, RT1 may not apply.

For example, in The book I read was helpful, inserting which works perfectly (The book which I read was helpful). So RT1 applies.

The book's wise advice: recover invisible links, don't invent them without evidence. Use the two-NP signal, test by inserting a marker, and confirm it makes sense. Don't force RT1 where it doesn't belong.

Say it again: Don't over-apply RT1. Test by inserting a marker, if it makes sense, RT1 applies. Recover real links; don't invent them. If the second NP clearly starts its own complete clause, RT1 may not apply.

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6. The step-by-step procedure

Here's the full procedure for handling an RT1 sentence:

1. Spot the trigger: two noun phrases side by side with no link, main verb later.
2. Confirm: is there a later main verb to host the main predicate? (If yes, the adjacent NPs are likely a reduced relative clause.)
3. Restore: insert the relative marker (whom/which/that) between the two NPs.
4. Read: the second NP now starts a relative clause describing the first NP; the real main verb is the later one.

Worked example

The article I mentioned yesterday has been published.

• Step 1: The article (NP) + I (NP): two NPs adjacent, with no link. Trigger spotted!
• Step 2: a later main verb exists: has been published.
• Step 3: insert the marker, article is a thing → which: The article which I mentioned yesterday has been published.
• Step 4: now it's clear: which I mentioned yesterday describes the article; the main verb is has been published.

So the core of the sentence is simply: The article has been published. The which I mentioned yesterday is just describing detail.

Hold onto this: RT1 procedure: spot two adjacent NPs (no link) → confirm a later main verb → insert the marker (whom/which/that) → read the second NP as a relative clause describing the first. The article I mentioned... has been published → The article which I mentioned... has been published.

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7. Where it sits in the method

RT1 brings together two things you know.

From The M5 Zone: Full Describing Clauses (a Major Milestone) (relative clauses): RT1 is just a relative clause (M5) with its marker deleted. You already learned the full relative clause; RT1 is the squeezed version. Restoring the marker turns the squeezed version back into the full one you know.

From Joining Equal Pieces: Coordination, Parallelism, and Deletion (ellipsis): RT1 is deletion-and-restoration, exactly like the ellipsis you practiced. You see a gap (two adjacent NPs) and restore the missing word (the marker).

And it's the gentle warm-up for RT2 (next post), which is more common and more powerful, but RT1 teaches the core habit: see the gap, restore the word.

One more time: RT1 is a relative clause (The M5 Zone: Full Describing Clauses (a Major Milestone)) with its marker deleted, restore the marker to get the full clause back. It's deletion-and-restoration (Joining Equal Pieces: Coordination, Parallelism, and Deletion), and a warm-up for RT2. Core habit: see the gap, restore the word.

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8. A few to attempt

Try each yourself first, then check the answers.

Exercise A, Restore the deleted marker

Insert the correct relative marker (whom/which/that).

1. The book I bought yesterday is expensive.
2. The woman we met at the station smiled.
3. The software they designed is stable.
4. The house he sold was old.
5. The student I advised passed the exam.

Exercise B, Spot the two adjacent NPs

In each, identify the two noun phrases that sit side by side.

1. The movie we watched was funny.
2. The recipe my mother gave me is easy.
3. The model the team developed won the prize.

Exercise C, Find the real main verb

After restoring, what is the main verb of the whole sentence?

1. The phone I bought is broken.
2. The students we invited have already arrived.
3. The article I mentioned yesterday has been published.

Exercise D: RT1 or not?

For each, decide if a relative marker can be restored (RT1 applies) or not.

1. The book I read was helpful.
2. The book fell off the shelf.

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Answers (try first, then check!)

Exercise A, Restore the deleted marker:

1. The book which I bought yesterday is expensive. (book = thing)
2. The woman whom we met at the station smiled. (woman = person)
3. The software that they designed is stable. (that works for things)
4. The house which he sold was old. (house = thing)
5. The student whom I advised passed the exam. (student = person)

(Note: "that" is also acceptable in place of which/whom in all of these; they're identifying clauses.)

Exercise B, Spot the two adjacent NPs:

1. The movie + we (adjacent)
2. The recipe + my mother (adjacent)
3. The model + the team (adjacent)

Exercise C, Find the real main verb:

1. The phone [which] I bought is broken. → main verb: is broken
2. The students [whom] we invited have already arrived. → main verb: have arrived
3. The article [which] I mentioned yesterday has been published. → main verb: has been published

Exercise D: RT1 or not?

1. The book I read was helpful. → RT1 applies (insert which: The book which I read was helpful ✓)
2. The book fell off the shelf. → RT1 does NOT apply (The book is the subject doing the falling; there's no second NP and no deleted object marker, this is just a normal V1 sentence)

How did you do? Exercise D is the discriminating one, knowing when RT1 does NOT apply (a normal sentence vs. a reduced one) shows you understand the trigger, not just the mechanical fix. If you got it, you've mastered RT1.

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9. Drawing it together

1. RT1 deletes a relative marker (that/which/whom). The book that I read → The book I read. You already do it naturally.

2. The trigger: TWO noun phrases side by side with no linking word, and the main verb comes later. English doesn't allow adjacent NPs with no link.

3. The restoration: insert the marker between the two NPs: whom (person), which (thing), that (either).

4. RT1 deletes only the object relative marker (the book [that] I read, that is the object of read). A subject marker can't be deleted this way.

5. Don't over-apply: test by inserting a marker, if it makes sense, RT1 applies. Recover real links; don't invent them.

6. The procedure: spot two adjacent NPs → confirm a later main verb → insert the marker → read the second NP as a relative clause describing the first.

7. RT1 is a relative clause (The M5 Zone: Full Describing Clauses (a Major Milestone)) with its marker deleted, restore it to get the full clause back.

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10. Onward to the next

You've handled the first Reduction Transformation, and you discovered it's something you already do every day. That's a gentle, encouraging start to the advanced section: the core habit (see the gap, restore the word) is now in place, and the rest builds on it.

In RT2: The Master Key to Reading Dense English, we tackle the big one: RT2 (Reduced Relative Recovery), by far the most common and most powerful reduction in all of academic English. It's the structure that has been previewed throughout the series (the Boot, the -ing puzzle, the "particles dispersed" sentence). Mastering RT2 unlocks entire categories of difficult text. Give it your full attention; it's the master key.

When you're ready, RT2: The Master Key to Reading Dense English tackles the most valuable reduction of all. First, spot a few the X I/we/they… structures around you and restore the deleted marker.