Which one is the affirmative form of the Present Simple?, S + vb + (s, es – pers.III, sg), Do/Does + S + vb, S + to be + vb-ING, S + have/has +vb (ed, formaa III-a), Which one is the interogative form of the Present Perfect Continuous?, To be + S + vb-ING, Have/has + S + vb (ed sau forma a III-a), Have/has + S + been + vb-ING, Do/Does + S + vb, Which one is the negative form of the Present Perfect Simple?, S + don't/doesn't + vb, S + to be + not + vb-ING, S + haven't/hasn't + vb (ed sau forma a III-a), S + haven't/hasn't +been + vb-ING, We use Present Simple when..., the action takes place at the moment of speaking, the action took place in the past but we don't know when, the action started in the past and continues in the present, we talk about habits, general truths; we express opinions, We use Present Continuous when..., we talk about habits, general truths; we express opinions, the action takes place at the time of speaking, the action took place in the past but we don't know when, the action started in the past and continues in the present, We use Present Perfect Simple when..., the action started in the past and continues in the present, we talk about habits, general truths; we express opinions, the action takes place at the time of speaking, the action took place in the past but we don't know when, We use Present Perfect Continuous when..., the action takes place at the time of speaking, we talk about habits, general truths; we express opinions, the action started in the past and continues in the present, the action took place in the past but we don't know when, Water boils at 100 degrees., Present Simple, Present Continuous, Present Perfect Simple, Present Perfect Continuous, My parents have just arrived., Present Simple, Present Continuous, Present Perfect Simple, Present Perfect Continuous, The boys have been playing tennis since 12 o'clock., Present Simple, Present Continuous, Present Perfect Simple, Present Perfect Continuous, He is writing a new book., Present Simple, Present Continuous, Present Perfect Simple, Present Perfect Continuous

Present Simple/Continuous & Present Perfect

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