Unit 8 Have you read Treasure Island yet？-2020-2021学年八年级英语下册语法知识归纳（人教版）

v Unit8 Have you read Treasure Island yet? 现在完成时态知识点归纳（一） 1.现在完成时态的定义：现在完成时( The Present Perfect Tense)表示动作发生在过去，但对现在仍有影响。 现在完成时的句式构成： 陈述句：主语+have/has+过去分词+其他。I have read the book. 否定句：主语+have/has+not+过去分词+其他。 She hasn’t read the book. 疑问句：Have/Has+主语+过去分词+其他？ Have you read the book? 2.现在完成时的用法： ①强调过去的动作对现在的影响：现在完成时表示说话时已经完成的动作，而且这个动作的结果对现在仍有影响，常与already，yet，now，just，by this time，so far（目前为止）等时间状语连用。本单元主要学习already与yet在现在完成时中的用法。 already和yet作为副词时都有表示“也，已经”的含义，但是通常情况下yet用于否定句或疑问句中，already用于陈述句中。此外，yet还可以作为连词使用，表示转折“但是”。 e.g. I have already finished my homework. Have you finished your homework yet? 现在完成时的时间点是现在，因此它不能与明确表示过去的时间的词语连用，如：ago，just now，last night,,,，但是可以和recently(最近），lately等过去时间点不明确的词连用。 练一练 根据要求改写句子。 1.Jill has already told her mother the truth of the matter.(改为否定句） Jill _______ _______ her mother the truth of the matter ______ . 2.Has Tim taken the medicine?(作肯定回答） _______,_______ _______. 3.Have they decided to take a long journey?(作否定回答） ________,________ ________. 4.They have raised lots of money for homeless people.(对划线部分提问） ________ have they _______ for homeless people? 5.My parents have been to America.(对划线部分提问） _________ ________ ________ parents _________? 二.单项选择 1.I have watched the game. -When ____ you ______ it? A.have;watched B.do;watch C.did;watch D.will;watch 2.Have you ever been to Shanghai? -Yes. I ______ there last month. A.have been B.went C.have gone D.go 3.Why don’t you go to the movie with me, Gina? -Because I ________ it twice. A.see B.have seen C.saw D.will see 4.Jim isn’t in the classroom. Where is he? -He ______ to the teacher’s office. A.will go B.has gone C.had gone D.is going 5.-_____ you ______ your homework yet? A.Did;do B.Do;do C.Have;done D.Will;do 三．根据句意，用括号内所给词的适当形式填空。 1.At the end of day,we felt happy the bus _____________ (bring)us back to our school. 2