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1、M6Unit1 Grammar: Present tenses 第四课时第四课时Aims and requirements To master the usage of the four present tenses A 时态简述时态简述 1. Simple present 概念：（1）表示客观事实或真理（2）经常性或习惯性的动作或现在的状态。(类似时间有 always, often, sometimes, every, now and then, time to time,)（3）表示一个按计划.规定.安排要发生的事情，常见动词有 come, go, leave, arrive, fly,
2、begin, start, end, open, stop, close。（4）在时间/让步/条件状语从句中，用一般现在时表示将来。 2. Present continuous 动词形式：be doing， 概念：（1）表示说话时正在进行的动作。（2）表示正在发展或变化的情况。Eg The population of the world is increasing.Science and technology are developing rapidly.（3）含有 always, constantly, forever, all the time 等的进行时，表示一个频繁发生的动作，相当于“
3、老是” （有赞赏.责备等感情） 。Eg You are always making the same mistakes.（4）动词如 go, come, leave, sleep, work, stay, play, take off的进行时可表示一个最近的安排或计划。 Note: (1)在英语中有些表示存在在英语中有些表示存在.所有所有.感觉感觉.认识等动词，不能用进行时。认识等动词，不能用进行时。 3. Present perfect 动词形式: have/has + done概念：（1）过去做的事情，强调对现在有影响， （句中没有过去的时间状语） 。Eg He has gone to F
4、uzhou.Where have you put the book? I cant see it anywhere.（2）动作从过去开始，持续到现在。常见时间状语有 already, yet, just, for, since, lately, in the last, so far, up till now.Eg Great changes have taken place in our hometown in the past three years.I have lived here since 1970.（3）下列句型常用完成时表示经历等It(This/That) is the fir
5、st time that.It is the best/most interesting film that It is the only thatEg It is the best movie that I have seen. 4. Perfect continuou 动词形式: have/has been doing 概念：（1）表示动作从过去开始，一直持续到现在，可能还要继续进行。Eg We have been looking for you for an hour. （2）表示一直到说话时为止的一段时间内一再重复的动作，常带有感情色彩。Eg She has been saying t
6、hat twenty times.巩固练习巩固练习 1.The father as well as his three children_ skating on the frozen river every Sunday afternoon in winter. A is going B go C goes D are going 2. My friend, who _on the International Olympic Committee all his life, is retiring next month.A served B is serving C has served D h
7、as been serving 3. I cant use my bike because it _.A is repaired B is being repaired C has been repaired D was repairing 4. It is time that I_ my hair cut. It is the third time that I_ to the barbers.A had, have gone B have, had gone C have, went D had, go 5. My house_ twice this month.-Im sorry to
8、hear that.A has been broken into B was broken in C has been broken in D was broken into 6. This is the most interesting film I_ in my life.A have ever seen B had ever seen C ever saw D ever was seen 7. Isnt it hard to drive downtown to work?-Yes, thats why I_ to work by train.A have been going B hav
9、e gone C was going D will have gone 8. Look. How long_ like this?-Three weeks. Its usual here that rain_ without stopping these days of the year.A has it rained, pours B has it been rainingC is it raining, is pouring D does it rain, pours 9. You_ things about .Look. What a mess in your room.A always
10、 throw B have always C are always throwing D have always been throwing 10. The trouble with such resources as coal, oil and gas_ that they are not renewable.A has been B are C have been D is 11. How are you today?-Oh, I_ as ill as I do now for a very long time.A didnt feel B wasnt feeling C dont fee
11、l D havent felt 12. Im going to leave at the end of this month.-I dont think you should do that until_ another job.A youd found B youll find C youve found D youd find 13. -Why? Tom, your shirt is so dirty.-Mum, I_ my storeroom downtowns.A cleaned B have cleaned C was cleaning D have been cleaning 14
12、. How are you planning to travel to Shanghai?-I_ yet, but I_ taking a train.A didnt decide, am considering B havent decided, considerC havent decided, am considering D hadnt decided, have considered 15. Have you handed in your schoolwork yet?-Yes, I have. I guess it_ now.A have graded B is graded C
13、is being graded D is grading 16. I like these English songs and they_ many times on the radio.A haughty B have taught C are taught D have been taught 17. Have you got any job offers? -No. I_.A waited B had been waiting C have waited D am waiting 18. Do you have any problems if you_ this job?-Well, I
14、m thinking about the salary.A offer B will offer C are offered D will be offered 19. Youd better not phone the manager between 7 and 8 tomorrow evening; he_ an important meeting.A will have B would have C will be having D will have had20. Ill come to see your performance at 9 tomorrow evening.-Im sorry, but by then my performance_ and I_ reporters in the meeting room.
