Educerie · SAT · Reading and Writing
Standard English Conventions · SEC.2 Form, structure and sense
What you must be able to do
| You must be able to | The trap that is set |
|---|---|
| Match a verb to its subject | Words piled between them: the box of samples was |
| Match a pronoun to the noun it stands for | A noun of the other number sitting between them |
| Tell a plural from a possessive | scientists · scientist's · scientists' · its/it's · their/they're · whose/who's |
| Put a verb in the right tense and aspect | A tense that changes for no reason; has been beside a finished date |
| Give every sentence a finite verb | -ing or to where the main verb should be, hidden by a long subject |
| Attach an opening phrase to the right noun | The dangling modifier: the phrase describes the wrong thing |
The idea in one paragraph
Where boundaries asks where a sentence stops, this skill asks whether its words fit together: does the verb match its subject, does the pronoun match what it stands for, does the sentence have a real verb at all, and is that verb in the right time. Every question here has a mechanical answer, and almost every wrong answer is built by putting something between the two words that have to agree — a phrase, a clause, a plural noun that is not the subject. Delete what sits in the middle and the sentence usually answers itself.
1Subject–verb agreement: find the subject, delete the middle
The test almost never asks about a simple sentence. It buries the subject:
The box of slides collected during the first expedition was damaged.
Subject is box, singular. Of slides collected during the first expedition is scenery. Delete it and the answer is obvious, which is exactly why the test puts it there.
Four patterns that break people:
Collective nouns are singular. The committee has decided. The team is travelling. They name one body.
Each, every, either, neither, one of — always singular. Each of the samples contains trace iron. The plural noun right before the verb is bait.
Inverted sentences put the subject after the verb. There are three reasons. On the table were two envelopes. Find what the sentence is actually about and match to that.
Compound subjects joined by and are plural; joined by or or nor, match the nearer one. Neither the samples nor the log was recovered.
2Pronouns: match the noun, not the neighbour
A pronoun takes the number of the noun it stands for, however far back that noun is: The committee reviewing the applications published its decision — not their, which matches applications. Two nouns joined by and take they/their; each researcher submitted their results is accepted.
Pronoun clarity (a pronoun that could mean two nouns): the old SAT tested it; the digital SAT does not.
3Plurals and possessives
Ask two questions, in order. How many? A number, the verb or the sentence before settles it. Does it own the next noun? Only then does it take an apostrophe.
| Form | Means | Example |
|---|---|---|
| scientists | more than one, owns nothing | The scientists disagreed. |
| scientist's | one, owns the next noun | the scientist's notebook |
| scientists' | several, own the next noun | the scientists' notebooks |
| children's | plural not ending in s: add 's | the children's diaries — never childrens' |
No noun after it to own, no apostrophe. In a pronoun, an apostrophe always means a missing letter:
| Owns | Contraction | Test |
|---|---|---|
| its | it's = it is / it has | Say "it is". If the sentence breaks, you want its |
| their (there = a place) | they're = they are | Say "they are" |
| whose | who's = who is / who has | Say "who is" |
4Verb tense and aspect
Tense is decided by the passage, not the sentence alone. Match a verb in a neighbouring sentence unless the meaning genuinely moves in time: The technique was refined in the 1960s and is still used today.
Aspect — finished, ongoing, or finished before another point — is signalled by a word nearby:
| Signal | Form | Example |
|---|---|---|
| since, for, so far: a span running up to now | has/have + -ed | Since 2015 the station has recorded two floods. |
| by the time, before + another past event | had + -ed | By the time the railway opened, the village had lost half its people. |
| by + a future point | will have + -ed | By 2040 the fund will have repaid the loan. |
The commonest wrong option: has beside a finished time. In 1887 or two centuries ago takes the simple past — the society was founded in 1887.
5Verb finiteness: every sentence needs a real verb
A finite verb carries tense and can run a sentence: stands, stood, has stood. Standing, to stand and having stood are non-finite: they describe, but cannot be the main verb. Four forms of one verb in the options usually means this rule.
The main clause has no verb. The fossils, collected by a farmer who found them, are now in the museum. Found belongs to the who clause, so being in place of are leaves a fragment.
A modifier has a verb it should not. The river, rising two metres overnight, cut the road. With rose, there are two main verbs and nothing joining them.
The check: strip every phrase inside commas and every who/which/that clause. What is left needs exactly one finite verb, or two joined by and, but or or.
6Modifiers: the phrase describes the noun after the comma
Built in 1904, the loom still runs. ✅ — the loom was built in 1904. Built in 1904, her grandmother still uses the loom. ❌ — her grandmother was not built in 1904.
The rule is mechanical: whatever sits immediately after the comma is what the opening phrase describes. When the options rearrange a sentence rather than changing a single word, this is almost always the skill being tested.
Two rules you can skip
- Parallel structure (reading, writing and speaking): the old SAT tested it; the digital SAT does not.
- Comparisons (like with like, fewer vs less): the old SAT tested them; the digital SAT does not.
Where points are lost
- Matching the verb to the nearest noun instead of to the subject. Delete what sits between them.
- Treating a collective noun as plural because it contains many people.
- Matching a pronoun to the nearest noun. Find what it stands for, then match its number.
- Guessing its/it's by feel. Say "it is" in your head. It takes a second and is never wrong.
- Putting an apostrophe on a plain plural.
- Changing tense because the sentence feels like the past. Check a neighbouring sentence.
- Taking a verb inside a who/which/that clause for the main verb.
- Ignoring what follows the comma on a modifier question. That noun is the whole answer.
Read it right
- Read the whole sentence, then find the subject and the verb.
- Delete everything between them and check agreement.
- Pronoun: name what it stands for. Apostrophe: count, then ask whether it owns the next noun.
- Tense: check the sentences either side and look for since, by the time or a date.
- Four forms of one verb: strip the supplements and check the main clause has a finite verb. Options that rearrange the sentence: check what the opening phrase describes.
- Read your answer back into the full sentence.
Try it
Q1. The collection of field recordings made during the 1972 survey ______ never been digitised.
A) have B) has C) were D) are
Q2. Each of the volcanic islands in the chain ______ its own subspecies of finch.
A) support B) have supported C) supports D) are supporting
Q3. Neither the original blueprints nor the builder's ledger ______ survived the fire.
A) has B) have C) were D) having
Q4. ______ nearly two centuries ago, the bridge still carries freight traffic daily.
A) Having designed it B) Designed C) Designers built it D) After designing
Q5. The dunes along the northern coast, pushed farther inland each winter by storms that strip away the grass holding the sand in place, now ______ just two hundred metres from the village.
A) standing B) to stand C) having stood D) stand
Q6. Researchers asked sixty children to keep a week-long food diary and then compared the ______ entries with the menus the school canteen had served.
A) children's B) childrens' C) child's D) childrens
In one breath
Find the subject, delete everything between it and the verb, and agreement answers itself — each, every and collective nouns are singular no matter how plural they sound. Match a pronoun to the noun it stands for, not the one beside it. Count before placing an apostrophe, give one only to a word that owns the next noun, and test its/it's by saying "it is". Keep tense where the passage put it, let since and by the time choose the perfect, check the main clause still has a finite verb once the supplements are stripped, and remember that an opening phrase describes whatever sits immediately after the comma.
Answers
Q1. B — has. the subject is collection, singular Of field recordings made during the 1972 survey is scenery between subject and verb. A, C and D are all plural, agreeing with recordings, which is the trap the sentence is built around. C and D also cannot be followed by been.
Q2. C — supports. each of is always singular The plural islands sits right before the verb precisely to pull you to a plural. A, B and D are all plural forms that agree with islands; B also shifts to a perfect tense with no reason in the sentence.
Q3. A — has. with neither… nor, the verb matches the nearer subject The nearer subject is ledger, singular. B and C match blueprints, the further one, and C is passive, which cannot take the fire as an object. D is not a finite verb and leaves the sentence without one.
Q4. B — Designed. the opening phrase must describe the bridge The bridge was designed two centuries ago, and the bridge is what follows the comma. A and D both make the bridge the one doing the designing. C is a complete sentence, so the comma would splice it onto the next one.
Q5. D — stand. the main clause needs a finite verb Strip the supplement between the commas and The dunes along the northern coast now ______ just two hundred metres from the village has a subject and no verb; pushed, strip and holding belong to the supplement. D is finite and plural, agreeing with dunes. A, B and C are non-finite and leave a fragment.
Q6. A — children's. several children own the entries; children is already plural Sixty children kept diaries, so the entries belong to all of them, and a plural not ending in s takes 's. B puts the apostrophe after an s that children does not have. C is singular, and no single child has been named. D has no apostrophe, so nothing owns the entries.
Educerie · written from the published College Board* Assessment Framework for the Digital SAT Suite *(Standard English Conventions, skill/knowledge testing point "Form, Structure, and Sense"). All sentences, options and explanations are original Educerie text. Last reviewed 26 September 2026.
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