2、句 Has he finished thework? 否定句 He hasnotfinished thework. 两回答 Yes,he has. / No,he hasn’t. 特殊疑问句 What has he done? 四. 在下列情形下用现在完成时(1)九词语①already 已经 肯定句中或句尾 e.g.Ihave already foundmypen.=Ihavefoundmypen already.②yet已经 否定句和疑问句句尾 e.g.Ihave
3、notfinishedthework yet.Haveyouboughtacomputer yet?③ever曾经 句中 e.g.Haveyou ever seenpandas?④never从不 句中 e.g.Ihave never beentoBeijing.⑤just刚刚 句中 e.g.Ihave just donemywork.⑥before以前 句尾 e.g.Ihaveneverbeenthere before.⑦sofar到目前为止
7、 ① Hehasboughtthebook.. (去掉一段时间for3years) ② Heboughtthebook3yearsago (改为一般过去时,使句子的意思不变) ③ It’s3yearssinceheboughtthebook.=3yearshaspassedsinceheboughtthebook.