Unit 3 Online tours(重点语法提升练) 现在完成时和一般过去时辨析 现在完成时与一般过去时的区别： 现在完成时侧重对现在的影响；一般过去时只是对过去的描述，不强调影响，是过去的时间点发生的事情。When提问时间点，不能跟现在完成时连用。 如：I have had breakfast. 我已经吃了早餐了。（已经饱了，不用再吃了） I had breakfast. 我吃过早餐了。（普通描述过去的事情，没有饱不饱的含义） Derek has watched the movie. When did he watch it 德里克已经看过这电影了。他什么时候看的？ 一、单项选择 1．Thanks to the use of 5G technology, ways of communication _____ a lot. A．improves B．has improved C．have improved D．improved 2．—What a nice bike! How long _____ you _____ it —Just five weeks. A．have; bought B．did; buy C．do; have D．have; had 3．—Are you going anywhere for a holiday this winter —Yes, I_____ a plan already. A．make B．will make C．have made D．am making 4．Mom, I _____ my homework. We can go shopping now. A．finished B．is finishing C．will finish D．have finished 5．—Why won’t you go to the movies with us, Peter —Because I _____ that movie twice. A．see B．have seen C．saw D．will see 6．I _____ my homework. Can I go to play with my friends now, Mom A．complete B．completed C．have completed D．will complete 7．How clean the classroom is! I’m sure someone _____ it. A．cleans B．is cleaning C．will clean D．has cleaned 8．—_____ you _____ your English homework yet —Yes. I _____ it a moment ago. A．Will; do; finish B．Have; done; have finished C．Have; done; finished D．Did; do; finished 9．—_____ you _____ the new 3D movie, John —Not yet. A．Did; see B．Will; see C．Have; seen D．Do; see 10．Lots of schools _____ the ways of teaching and learning in the past few years. A．change B．have changed C．will change D．changes 11．—Our computer is working again! —Yes. Our IT teacher _____ it. It took him only a few minutes. A．has fixed B．will fix C．was fixing D．is fixing 12．He told me he would be here at 2 o’clock. But he _____ yet. A．didn’t arrive B．isn’t arriving C．hasn’t arrived D．won’t arrive 13．—Mike, why are you standing outdoors —I _____ my keys. I have to wait here until my mother comes back. A．have lost B．will lose C．lose D．am losing 14．Dad, I _____ doing my homework. Can I go out and play with my friends now A．finish B．have finished C．am finishing D．will finish 15．— _____ you ever _____ the new movie — Yes, I saw it last night. A．Have; seen B．Are; seeing C．Will; see D．Do; see 16．He _____ the town twice. We won’t get lost. A．visited B．has visited C．will visit D．visits 17．David knows much about the city because he _____ there many times. A．has been B．has gone C．went D．goes 18．—Mr. Li will come to check our homework this afteroon. _____ you _____ it —Not yet. I _____ it right now. A．Did, finish; will do B．Did, finish; am doing C．Have, finished; will do D．Have, finished; am doing 19．—I am not feeling well. I _____ like this since last Friday. ―You’d better go to see a doctor. A．was B．have b ... ...
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