Unit 8 Have you read Treasure Island yet (重点语法提升练)- 现在完成时（1） 用法详解： 一、现在完成时的用法： 时态 含义 结构 时间状语 现在完成时 表示过去发生的动作对现在的影响，或者表示从过去持续到现在的动作或状态 has/have+动词的过去分词形式 since，for，so far，already，yet，recently，ever，twice，in the last /past few years 【易错警示】 for+时间段，表示“持续……” 常用于现在完成时态 since+ 过去时间点 / 过去时的句子，表示“自从……以来”，常用于现在完成时态。 just：刚刚；常用于现在完成时态，通常放在助动词之后，实义动词之前。The train has just left. just now：刚才；相当于a moment ago，常用于一般过去时，通常放在句末。 I saw him just now. yet 已经；与现在完成时连用，用于疑问句或否定句中，通常置于句末，也可与not连用，表示“还没有”。 already 已经；与现在完成时连用，常用于肯定句中，一般不用于否定句，但可用于疑问句中 never 从不；常与完成时连用，用在句子中表否定 二、现在完成时的句型结构： 一、单项选择 1．—I hope I’m not late. —I’m afraid the meeting _____ already. A．has started B．will start C．is starting D．starts 2．I _____ many new friends since I became a middle school student. A．make B．made C．will make D．have made 3．The famous writer _____ two new books since 2020. A．is writing B．was writing C．has written D．wrote 4．Since the first text message in 1992, texting _____ very popular. A．has become B．becomes C．became D．is becoming 5．This book must be great. My sister _____ it three times. A．has read B．reads C．is reading D．will read 6．We _____ the computer for you. You can use it now. A．will fix B．have fixed C．are fixing D．fixed 7．My parents _____ in Hong Kong since ten years ago. A．live B．lived C．have lived D．has lived 8．People _____ for the lost boy for two days. His parents are worried. A．search B．will search C．have searched D．were searching 9．—_____ you _____ the new 3D movie, John —Not yet. A．Did; see B．Will; see C．Have; seen D．Do; see 10．My mother has taught in this school _____ she was 24 years old. A．if B．since C．until D．because 11．—I heard that you are going to be an exchange student for _____ study. —Yes, and I have _____ learnt about the school. A．further; already B．farther; yet C．more; just now D．much; yesterday 12．—Our motherland _____ a lot so far. —Yes. I hope it will be even _____. A．has changed; better B．changed; good C．has changed; well D．changed; better 13．Your brother _____ books in his room for about two hours. A．read B．is reading C．reads D．has read 14．I haven’t seen him _____ three years _____ we met in Shanghai. A．for; since B．since; for C．in; since D．for; when 15．So far, we _____ 6000 English words. A．are studying B．have studied C．studied D．study 16．—_____ you _____ your homework —Yes. I _____ it an hour ago. A．Did, finish; have finished B．Did, finish; finished C．Have, finished; finished D．Have, finished; have finished 17．—Bruce’s new movie is a big success. I want to see it this weekend. —I _____ the movie already. To tell the truth, it is ... ...
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