一 现在完成时1.过去某一时间点发生的动作对现在产生影响。2.过去某一时间点发生的动作持续 到现在或还将持续下去。二基本结构have / has + done 助动词 （可以帮助构成肯定、疑问和否定句）1.He has cleaned his room. (写一个一般疑问句）2. She has lived in London for four years. (划线部分提问）3. He has been to China, ____ ____? （写出反义疑问句部分）4. They have come back from work.(写否定句）三Key words1.注意：already 用肯定句，yet 用疑问句和否定句中A: ______ your brother ______ his homework yet? (finish)B: Yes, he ‘s already done it.2.注意： ever 曾经 用疑问句中never 从不 带有否定意义A: _______ you ever _______ to the park? ( be )B: No, never. 3．Just 与现在完成时连用 一般置句中Just now 才 与一般过去时连用I ______ just ________ the desk, you can take it to your classroom . (mend )4.since 后面带过去时间或有一般过去时的句子Tom ___________ in the factory since he left school ten years ago. (work )5.for + 一时间A: How long ______ you ________ in this school? (teach )B: For 6 years. 6.so far We _______ only ____________ 100 trees so far. (answer ) 7.in the past 10 years how long twice也可以是其他表示次数的词He has bought the book. He has bought the book for a week. He has had the book for a week. She has bought the computer for two years.How long have you come to the United St |
