Negative Sentences-,, Subject + didn’t + V1 + Object + (.), She didn’t.write a letter., 3. INTERROGATIVE RULE - is/am/are + sub + v1 + ing + object Example –, Is she writing a letter?, INTERROGATIVE NEGATIVE RULE - is/am/are + sub + not + v1 + ing + object, Example – Is she not writing a letter?, (3) Present Perfect– It is used to show an action that started in the past and has, just finished., ASSERTIVE RULE - sub + has/have + v3 + object Example- She, has written a letter., NEGATIVE RULE - sub + has/have + not + v3 + object,, Example –,, She has not written a letter., INTERROGATIVE RULE - has/have + sub + v3 + object, Example- Has she written a letter?, INTERROGATIVE NEGATIVE RULE -has/have + sub + not + v3 + object, Example– Has she not written a letter?, (4) Present Perfect Continuous– This tense shows the action which started in, the past and is still continuing., ASSERTIVE RULE - sub + has/have + been + v1 + ing + object, Example – She has been writing a letter., NEGATIVE RULE - sub + has/have + not been + v1 + ing + object, Example– She has not been writing a letter., INTERROGATIVE RULE -has/have + sub + been + v1 + ing + object, Example – Has she been writing a letter?Ģ.
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