We use must in affirmative sentences to say what is necessary and to give strong advice and orders to ourselves or other people. Children must… Continue reading
Using must, should and ought to
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Should with perfect infinitive
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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
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
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
Difference between present perfect and present perfect continuous tenses
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The present perfect continuous tense is used to talk about a continuous, but not necessarily finished action or situation. The present perfect tense is used… Continue reading
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