Principal Parts of a Verb
Review the principal parts of verbs at this American Heritage Book of English Usage web site. Regular and irregular verbs, base forms, past tense, and past participle are discussed on this site.

The Action Verb
Review strategies and examples for identifying action verbs in sentences.

The Participle
Review the two kinds of participles: past and present. The functions of participles include participles working in multipart verbs, participles working as adjectives, and participles working as nouns.

The Gerund
This site looks at gerunds and verb forms that end in -ing. The differences between present participles in verb phrases and gerunds is explained and supported with examples.

The Infinitive
Review techniques to identify infinitives in sentences. Easy-to-understand examples show special situations that sometimes occur with infinitives in context.

Irregular Verbs
In this interactive exercise, you write the proper verb forms inside sentences. The verbs used throughout the exercise are irregular verbs. After you complete the exercises, you will get your score.

Irregular Verbs Crossword Puzzle
Have some fun with this crossword puzzle, which uses irregular verb forms. After you finish the puzzle, you can have your work checked.

Use of Modal Auxiliaries
Select the correct verb form to complete each of the sentences. This interactive exercise works with helping verbs that form verb phrases. After you finish the exercise, you will get a score for your work.

Verbmaster!
This interactive quiz tests your ability to recognize verbs and verb phrases (verb strings). After you write the verbs for each sentence in the text boxes, you can receive a score for the quiz.

Verbmaster 2
This second Verbmaster quiz tests your ability to recognize verbs and verb phrases (verb strings). You will need to distinguish between participles that function as verbs and participles that have other functions. After you finish the quiz, you can receive a score.

Tenses of Verbs
This web site from the American Heritage Book of English Usage defines tenses of verbs. In addition to the simple tenses, the site explains perfect and progressive tenses.

Verbs Worksheet
"Every verb has five principal parts: infinitive, present, past, present participle, and past participle." Each of these principal parts is defined in easy-to-understand wording that is followed by examples.

Verbal Phrases
On this site, you can receive instruction on phrasal verbs (verb phrases) and then complete an interactive quiz. Following the quiz, you can return to the guide to review any of the topics in the exercise.

Conditional Verb Forms
In this interactive exercise, you select one of the three verb forms that completes the sentence correctly. Any time you need further explanation, you can click on a link to review the rules or receive suggestions.