必威体育精装版整理-国际音标入门[精品资料].pptVIP

现在完成时 现在完成时: have/ has +过去分词 1) 表示到现在为止已经完成或刚刚完成的动作。 Now we have planted all the trees. He has just come back. 2) 表示过去发生的动作, 但强调结果或对现在的影响。 Have you had your supper? I have read the book twice already. 3) 表示过去已经开始, 持续到现在, 也许还会继续下去的动作或状态，常与包括现在在内的一段时间的状语连用。 He has studied English for 6 years. Mary has been busy since she came back from Hangzhou.. 常跟： Already：已经 not…yet：还没有 Never：从不 just,：刚刚 Before：在…以前 Ever：曾经 Recently：最近 Since：自…以来 For：持续…时间 Just：刚刚 等时间继续下去的状语。 过去分词的构成 1.直接加-ed。如：play-played 2.以字母e结尾的直接加d 。如：name-named 3.以辅音字母加y结尾的，变y为i加ed。如：carry-carried 4.重读闭音节且末尾只有一个辅音字母，双写这个辅音字母再加-ed。如：stop-stopped 现在完成时 Present perfect 句型 1.肯定句 现在完成时的肯定句式是“have（has）＋过去分词”。 注意：该句式中的have或has是助动词，has用于第三人称单数，其它人称一律用have。 2.疑问句 　　现在完成时的一般疑问句式是把助动词have或has提到主语之前。 （回答用“Yes，．．．have（has）．／“No，．．．haven’t（hasn’t）．” ） 3.否定句：现在完成时的否定句式是“havent（hasnt）＋过去分词”。 * * since, for, yet, already … I have eaten my lunch. She has eaten her lunch. He has eaten his lunch. 肯定句 They have eaten their lunch. I have not (haven’t) seen the film. She has not (hasn’t) seen the film. 现在完成时的否定形式： have not (haven’t) +过去分词 has not (hasn’t) +过去分词 I haven’t eaten supper. eat-eaten He hasn’t changed his idea. change-changed My mother hasn’t come back home. come-come 否定句 I’ve already had dinner. I ________ ________ dinner ________. 2. He has just finished his homework. He ________ ________ his homework _________. 3. Mum’s cooked the dinner. Mum _______ ________ the dinner. 4. Susan’s learned English at school. Susan ________ ________ English at school. haven’t had yet hasn’t finished yet hasn’t cooked hasn’t learned 把下列句子改为否定句 Have you eaten your breakfast? 现在完成时的一般疑问句形式 Have/has 提前+过去分词 Have you known Sandy for a long time? Yes, I have/ No, I haven’t. know-known Has she eaten anything since 9:00 a.m. Yes, she has/ No, she hasn’t. eat-eaten 疑问句 I’ve already had dinner. 2. He has just finished his homework.