Should can be used with the perfect infinitive (have + past participle). This structure has several meanings. Should have + past participle This structure is… Continue reading
Should with perfect infinitive
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Changing sentences in the simple present tense into passive
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When the active verb is in the simple present tense, we make passive verb forms with is/am/are + past participle form of the verb. Note… Continue reading
Passives: some special points
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Some verbs can be followed by two objects. The objects usually refer to a person (indirect object) and a thing (direct object). The indirect object… Continue reading
Time adverbs used with the present perfect tense
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The present perfect tense is commonly used with the indefinite time adverbs never, ever, before, yet, already. Have you ever been to the USA? I… Continue reading
Present perfect continuous tense
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Form: has / have + been + ing form of the verb Affirmative Question Negative I have been working. Have I been working? I have… Continue reading
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