To echo the words of The College Board course description, “The AP Language and Composition course assumes that students already understand and use standard English grammar.” If there are gaps or areas that need refreshing beyond what is covered in class, students should refer to one or more of the following websites for further clarification, samples and practice activities.

Fragments, run-ons and the use of punctuation to avoid them:

Punctuating Run-on Sentences and Comma Splice Sentences
Run-on Sentences, Comma Splices

Sentence combining:

Sentence-combining Skills
Sentence Patterns and Combining

Using commas correctly:

Using Commas
Rules for Comma Usage
Guide to Using Commas

Apostrophes, semi-colons and other punctuation issues:

Punctuation Made Simple

A general list of many grammar problems and their solutions including those above:

Guide to Grammar and Writing

Misuse of words (lie/lay, then/than, their/there, number/amount)

Common Errors in English

[AP Language]