Glossary

active voice	mode of expression in which the subject performs the action expressed by the verb; (e.g., The boy threw the ball.)



passive voice	mode of expression in which the subject receives the action instead of performing it; (e.g., The ball was thrown by the boy.)



past participle	one of the principal parts of every verb: formed by adding -d or -ed to the present; used with the helping verbs have, has, or had, or with a form of be (with passive verbs)



principal parts of verbs	the four parts of every verb: present, past, past participle, and present participle



verb tense	the times shown by verbs (present, past, future, etc.)



Present perfect	I have worked.



Past perfect	I had worked.

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