英语课件动词时态.ppt

1、动词时态,一般现在时,主+ V 原 / V-(e)s,1.经常性或习惯性的动作 时间标志：,every ; always; often; sometimes; at ; never on Sundays; once a week usually;,2. 客观真理,客观存在,科学事实,主将从现,一般过去时,主+ V-ed,tried our best,表示过去某一时刻或某一段时间内所发生的动作或情况,时间标志：,yesterday; the day before yesterday; last ； ago 等表示过去时间的词语,动词过去式的构成,规则变化,不规则变化见BOOK 3,ed,d,变y

2、 为i 再加 ed,双写尾词加 ed,ed,ed,d,d,ped,ped,肯定: 否定: 疑问:,Tom 刚才打了电话给她.,Tom rang her just now.,Tom didnt ring her just now.,Did Tom ring her just now?,谓语是行为动词时,否定和疑问句要借助助动词did,原来的行为动词要用原形.,现在完成时,主+ have / has +PP,has lived in,just 刚刚 already 已经 before 之前 ever 曾经 never 从来没有 so far 到目前为止 yet 还（没有）否定句 these day

3、s 这些天 in the past years / months 在过去的年/ 月里,for 时段 since 时点,现在完成时的标志词,for + 时段 since + 时段 + ago since + 时点 Its / It has been + 时段 + since + 一般过去时句子,1. Its ten years since she . A.has left B.has been away C.left 2. I have been here _ 4 years. A. since B. for C. from 3. We have learnt English _ six yea

4、rs ago. A. since B. for C. from,4. _ has been 5 years since we came here. A. There B. It C. That 5. Its three years since he the army . A.has joined B.has been in C.joined 6. How many years is it _ you graduated from junior high school? A. since B. for C. from,短暂性动词和延续性动词,不 与 时 间 段 连 用,可 与 时 间 段 连 用

5、,be (in) here / there,be a member of,be dead,be on,have,be away,keep,be over,be open (adj.),be closed,be married,短语辨析,He has been to Shanghai three times.,He has been in Shanghai for ten years.,He has gone to Shanghai and havent come back yet.,在某地（多长时间） 现在仍在那里。 常与时段连用。,曾去过某地（次） 现在已不在那里。 可与just, ever

6、, never等连用，,去了 还没有回来,现在完成时与一般过去时的区别,lost,have lost,表示动作发生的时间在过去 没有说明现在的情况,表示过去的动作一直延续到现在甚至会继续下去,或表示过去的动作对现在造成的影响,1. I have seen the film “Titanic”already. When _ you _ it？ The day before yesterday. A. have；seen B. will；see C. did；see 2. Mr Black _ in China since five years ago. A. lived B. has lived C. lives 3. We _ trees last Sunday. So far we _ over 3,000 trees there. A. planted；planted B. planted；have planted C. have planted； planted,结构,主(非三单) + V 原,主(三单) + V- (e)s,主 + V-ed,主 + am / is / are + V-ing,主 + was / were + V-ing,主 + have / h