Overview

CAEC Reading

Grammar and Language

7. Grammar and Punctuation

7.81 Relative Pronouns and Modal Verb Usage

Relative Pronouns and Modal Verb Usage

Sharpen relative pronoun case, clause punctuation, and modal verb precision to construct the complex sentences standardized tests reward.

What You'll Learn

Distinguish restrictive from nonrestrictive relative clauses to punctuate sentences correctly

Select who versus whom by identifying the grammatical case required inside the embedded clause

Choose modal verbs that convey the precise degree of certainty, obligation, or permission intended

Apply perfect modal constructions such as should have and might have to express past probability

Combine relative clauses and modal verbs to construct syntactically layered, test-ready sentences

Recognize the pronoun-antecedent and modal verb errors that recur most often in editing-style test items

What You'll Practice

Choosing who versus whom in editing items where the pronoun's clause sits far from its verb

Judging whether a clause is restrictive or nonrestrictive to decide correct comma placement

Matching a modal verb's degree of certainty to the evidence given in a reading passage

Rewriting sentences to correctly distinguish should have, would have, and could have

Combining a relative clause and a modal verb into one syntactically complex sentence

Why This Matters

Standardized test writing and reading sections repeatedly hinge on small grammar distinctions embedded in long, complex sentences. Knowing precisely when a clause needs commas, when a pronoun should be whom rather than who, and which modal verb matches a passage's real degree of certainty lets you answer editing and inference questions with confidence instead of guesswork, and it makes your own writing more exact under timed conditions.

This Unit Includes

Practice exercises

Learning resources

Skills

Relative Pronouns

Modal Verbs

Clause Punctuation

Grammatical Case

Complex Sentences

Perfect Modals

Test Editing Skills

TEST-PREP Curriculum Aligned