中考英语时态完成时课件.pptxVIP

完成时的分类;(1) 延续性动词或持续性动词是指表示能够延续的动作。 常见的延续性动词有 work, stand, lie, know, walk, keep, live, have, wait, watch, sing, read, sleep, stay, teach, learn, study等 (2)非延续性动词、瞬间动词或点动词，表示不能延续的动作, 这种动作发生后立即结束。 常见的非延续性动词有open, die, close, begin, finish, come, go, move, borrow, lend, buy, arrive, leave, lose, join等 ;现在完成时是过去的动作或状态持续到现在，或对现在造成的影响，可能持续发生下去。 它的构成是：主语+助动词(have/has) +动词的过去分词(done)。 The students have finished their homework. She has worked for 10 hours. They have lived here for 20 years;2. 现在完成时句型构成;③一般疑问句： Have/Has+主语+动词的过去分词+其他? Has he slept for three days? Have you worked for two hours？ Have you been to the Great Wall twice?; (2) 被动语态 ① 谓语动词的肯定形式: 主语+have/has been done+其他 She has been invited to participate in the competition. ;③ 一般疑问句：Have/Has+主语+been done+其他？;④ 特殊疑问句： 疑问词+have/has+主语+been done+其他？ What has she been invited to do? Who has been invited to participate in the competition? Who has not been invited to participate in the competition?;3. 现在完成时的用法;(2) 表示过去的某一动作一直持续到现在, 常以for+一段时间/since+过去的时间点或动作为时间状语。;注意： 当现在完成时表示持续时，谓语动词不能使用非延续性动词（短暂性动词），而应该使用延续性动词。 She has kept the table for three months. The old lady has lived here for more than twenty years.;(3)表示经历过的事情 表示过去的一种经历，这种经历不可能被埋没或否定，常与 often、never、ever、only、twice等时间状语连用，可用how many times 提问。 ① I have only been to the Great Wall once. ② Have you ever been to the concert? ③ －How many times have you been to the West Lake？ －I have been to the West Lake twice.;have/has gone to 与 have/has been to 的区别 have/has gone to 表示 “去而未归” have/has been to 表示 “去过已经回来了”。;(4)完成时和until now，so far，in the past few years，up to the present/now等表示从某时到这段时间的??语连用 ① I have not heard from her so far. ② We have learned five hundred words up to the present. ③ They have been to many cities up to now ;注意： 当意义明确时，适用完成时的句子可以不用时间状语。 ① He has done a lot of work. ② She has told me about her story. ;(5)完成时在时间和条件状语从句中表示将来完成的动作 ① Ill go to the party as soon as I have finished all my homework. ② Dont ge