学习好资料欢迎下载现在完成时态讲练考点一概念与结构典型考题 ：1. He (take) the medicine before. I (never hear) of that before. 2. --Would you like to see the film with me?--I'm sorry I __________it twice. A. see B. will see C. have seen D. am seeing 3. In the past few years there great changes in my hometown. A. have been B. were C. had been D. are 4. --Kitty, will you go to see the film -Cold Mountain this evening? --No, I won't. I it already. A. saw B. have seen C. see D. will see 5.Has your brother _____ the dog? A kept in B fed C fed on D kept on 6.I'm sorry, I ____ your name. A had forgotten B forgot C have forgotten D forgotten 7 .We have all the paper so we need to buy some. A used up B made of C filled with D 考点二already 与 yet "already" 用于现在完成时的肯定句中He has (already) visited many places in China. He has come back now. 注意"already" 在句中的两种位置. He has (already) visited many places in China. He has visited many places in China(already) . "yet" 用于现在完成时的否定句和疑问句中,常于句末The train hasn‘ t arrived yet.火车（到现在）还没有到。 Has she arrived yet? 她已经到了吗？Hasn‘ t he come yet? 她还没来吗？典型考题： I have already finished my hpmework.(改为一般疑问句 ) you your homework ? 考点三、延续性动词与短暂性动词在现在完成时肯定句中，与since 或 for 引出的时间状语连用的是延续性动词，不能是短暂性动词，但在否定句中短暂性动词也是可以的。E.g. I haven't bought clothes for one year.但是， 可用别的表达方式：① 瞬间动词用于 “一段时间+ ago”的一般过去时的句型中；②瞬间动词可改成与之相对应的延续性动词及短语，与一段时间连用；③瞬间动词用于 “It is + 一段时间+ since + 一般过去时”的句型中，表示“自从 ⋯⋯ 以来有⋯⋯ 时间 ”的意思，主句一般用it is 来代替It has been; ④ 瞬间动词用于 “ Some time has passed ...
