中考专题英语现在完成时.ppt

* 现在完成时态 现在完成时 1．现在完成时的构成：助动词have (has) + 动词的过去分词 注：has 用于第三人称单数，have 用于其他所有人称。其否定句在 Have/has后加not. 一般疑问句把have/has提到主语前. 动词的过去分词 规则: 不规则: 1. + ed 2. + d 3. y i+ ed 4. 双写+ ed 2. bring,buy, teach, catch, feel, find, get,have, win, hear, hold, keep, lay, learn, leave,lose,make, meet, say, sell, sit, sleep, smell,spend, stand, sweep, tell, 1. put, cut, let, hit, hurt, set, read 3. become, come, run, 5.am/is-was-been are-were-been begin-began-begun break-broke-broken do-did-done draw-drew-drawn drink-drank-drunk drive-drove-driven eat-ate-eaten fall-fell-fallen fly-flew-flown forget-forgot-forgotten give-gave-given go-went-gone grow-grew-grown hide-hid-hidden know-knew-known lie-lay-lain ride-rode-ridden ring-rang-rung show-showed-shown see-saw-seen sing-sang-sung speak-spoke-spoken take-took-taken 2．现在完成时的用法： （1）现在完成时表示过去发生或已经完成的某一动作对现在造成的影响或结果.通常与表示包括现在在内的时间副词just, already, before, yet, never, ever等状语连用.例如： 有时没有时间状语；多是一般疑问句。 Have you spoken to a foreigner? ① I have never heard of that before. ② Have you ever ridden a horse? ③ She has already finished the work. ④ Have you milked the cow yet? Yes, I have done that already. ⑤ I’ve just lost my science book. 区别 he was here just now. （2）现在完成时表示过去已经开始，持续到现在,也许还会持续下去的动作或状态.可以和表示从过去某一时刻延续到现在(包括现在在内)的一段时间的状语连用. 如：for和since，以及 so far, now, today, this week(month, year), these days, in the last ten years 等。 ① I haven’t seen her these days. ② She has learnt English for 3 years/since 3 years ago. ③ They have lived here since 1990. ④ What has happened to the USA in the last 350 years? 注意：表示短暂时间动作的瞬间动词, 如come, go, marry, buy, begin borrow, die,等的完成时不能与for,since等表示一段时间的短语连用,但在否定句中可以. 如果与时间段连用, 必须变为相应的延续性动词. I haven`t heard from you for a long time. His father has died for twe