2、He hasfinished thework. 一般疑问句 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? 4. 在下列情形下用现在完成时9词语①already 已经 肯定句中或句尾 例:Ihave already fou
3、ndmypen.=Ihavefoundmypen already.②yet已经 否定句和疑问句句尾 例:Ihavenotfinishedthework yet.Haveyouboughtacomputer yet?③ever曾经 句中 例:Haveyou ever seenpandas?④never从不 句中 例:Ihave never beentoBeijing.⑤just刚刚 句中 例:Ihave just donemywork.⑥befo
7、时间状语连用 例:Hehasboughtthebookfor3years.(错)因buy这个一次性动词不能和一段时间for3years连用, 改正的办法有五种: 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.=3yearshaspassedsinc