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ModalsRule #1: After a modal (can, will, may, might ) the next verb is in the simple form. (Modals appear with verbs, but are not really considered verbs because they NEVER take -ed, -ing, or -s endings.) We can go with you. He may want to come with us.
Verbs After Do/DoesRule #2: After the helping verb "do", the next verb is the base form (just like a modal in the first rule). To emphasize a main verb: You do look delightful today. To express a negative meaning along with not: You do not need that green registration form. To ask a question: Do you want your dessert? Verbs After Have/Has/HadRule #3: After have/has/had, the next verb is in the past participle. We have gone to that movie. Regular past participles:
Irregular past participles:
Verbs After Be (Is, Are)Rule #4: After "be" in any form in the active voice, the next verb is the present participle (-ing form). He is going with us. Passive VoiceRule #5: In the passive voice, after "be" the next verb is the past participle. The letter was written by him. Verbs After PrepositionsRule #6: After a preposition (by, about, in ), the next verb is the present participle (-ing). By talking to the teacher first, you will often avoid problems on the test. Verbs After ToRule #7: After "to" following a verb, the next verb is in the simple form. (This is a rule which applies even in sentences about the past. We cannot say, "Last night, he decided to talked to her." Only the main verb "decided" is in the past tense and takes the -ed ending.) I want to go with you. Verbs that can't take the -ing formRule #8: Some verbs (called state-of-being verbs) cannot be used in the progressive, "-ing," form. Examples of state-of-being verbs:
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