Unit 2 Travelling around Discovering Useful Structures语法精讲 课件- 高一上学期英语人教版（2019）必修第一册.pptx

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1、三种将来时间表示法的比较,一、三种将来时间表示法的比较“will / shall动词原形”与“be going to 动词原形”两者均可表示将来时间和意图，两者有时可换用：I think itll rain this evening. / I think its going to rain this evening. 我想今晚会下雨。2. I wont tell you about it. / Im not going to tell you about it. 我不会把这事告诉你的。但有时有差别：, 若是强调某个意图是经过事先考虑好的，则通常要用be going to；若是表示某个意图没有经

2、过事先考虑，而是在说话的当时才临时想到的，则通常用will。比较：“Ann is in hospital.” ”Oh, really? I didnt know. Ill go and visit her.” “安住院了。”“啊，真的吗？我还不知道。我要去看看她。” (临时想法，不能用be going to)“Ann is in hospital.” “Yes, I know. Im going to visit her tomorrow.”“安住院了。”“我知道，我打算明天去看看她。” (事先考虑的意图，不能用will), 若是有迹象表明要发生某事，通常只用be going to，不用wil

3、l：Look at those black clouds. Its going to rain. 看那些乌云，要下雨了。 带有时间或条件状语从句的主句通常不宜用be going to，而用will：1. When he comes back, I will tell him the news. 他回来时我就告诉他这个消息。2. If he comes back, I will tell him the news. 他若回来我就告诉他这个消息。,(2)“be going to+动词原形”与“现在进行时” be going to主要表示主观想法或意图，而现在进行进表示将来则主要已经强调作出的安排。

4、比较：1. Im going to wash the car if I have time. 若有时间我想洗洗车。(主观想法)2. Im picking you up at 6; dont forget. 我6点钟来接你，不要忘了。(已作出的安排), 但是当要表示主观无法控制的预测时，通常要用be going to，不能用现在进行时态：1. Its going to snow before long. 不久会下雪。2. Things are going to get better soon. 情况很快就会好起来。 当表示坚持要(不要)某人做某事时，两者均可用：1. Shes taking go

5、ing to take that medicine whether he likes it or not. 不管她喜欢不喜欢，她都得吃那药。2. Youre not wearing going to wear that skirt to school. 你不可以穿那条裙子去上学。,(3) “be going to+动词原形”与“be to+动词原形”的区别两者均可表示按计划或安排要发生的动作，有时可互换(但be to比be going to正式)：Im (going) to play tennis this afternoon. 我打算今天下午打网球。另外，be going to 还可表示预测

6、，即根据已有迹象预测将要发生的动作，此时不能用be to：Look, its going to rain. 看，要下雨了。,二、用法拓展1. 表示与生日，日历，课时安排或交通时刻表有关的动作(一种规律) ，用一般现在时表示将来时态。常用于转移动词如：begin, come , leave, go, arrive, start, stop, return, open, closeThe evening class begins at 19:00. 晚课7点开始。The train starts at two. 火车两点出发.,2. 在时间或条件状语从句中，主句用将来时，从句用一般现在时表示将来时

7、标志：when, as soon as, before, once, if , unless, even if, in case等If you come this morning, we will have a meeting.When I graduate, I will go to the countryside.,Grammar现在进行时表将来,感知下列句子，完成方框下的小题,语法感知,1.We are waiting for you now.2.Now she is planning our schedule for the trip.3.I am taking the kids to

8、 the zoo this Sunday.4.I kept asking her，“When are we leaving and when are we coming back？”,1.现在进行时表示此时此刻正在进行的动作。如句 。2.现在进行时有时可以表示按计划或安排即将发生的动作，这种现在进行时比较生动，给人一种期待感。如句 。,3、4,1、2,一、现在进行时表示将来 现在进行时可以表示将来，常含有“意图”“安排”或“打算”的含义，这种用法可以使句子更加生动，给人一种期待感。具体用法如下：1常表示最近或较近的将来，所用动词多是表示位置转移的动词，但偶尔也表示较远的将来。 Im meeti

9、ng you after class.下课后我找你。2表示将来的现在进行时有时含有“决心”的意思，多用在否定结构中，有时也用在肯定结构中。 Im not waiting any longer.我不再等了。,语法精讲,3现在进行时也可在时间、条件或原因状语从句中表示将来。When you are passing by my front door，please drop in.你什么时候路过我家，请进来坐。(时间状语从句)4不是所有的动词都可以用进行时态表将来，只有表示具体位置移动意义的动词及少部分其他意义的动词才可以用进行时态表将来。此类动词(词组)如下：arrive，begin，come，di

10、e，go，leave，end，return，start，travel，fly，stop，close，drive，fall，remain，stay，move，land，leave for，take off，see.off等。Hurry up.The plane is taking off soon.快点。飞机马上就要起飞了。,二、其他几种表示将来的结构1will/shall do表达单纯的将来时，是对未来事情发生的一种“预见性”。可用于说话时才想到或决定的事。will用于各种人称，而shall仅用于第一人称。,Im sorry.I forgot to post the letter for yo

11、u.Never mind.I will post it myself this afternoon.对不起，我忘了给你寄信了。不要紧，今天下午我自己去寄。,2be going to do用来表示近期或事先考虑要做的事情，以及有迹象表明将要发生的事。,Look at those black clouds；theres going to be a storm.瞧那些乌云，眼看要有暴风雨了。,3be to do表示预定、按计划或安排将要发生的动作。,The meeting is to take place early tomorrow.会议明天一早召开。,4be about to do表示马上就要发

12、生的事，不与具体的时间状语连用，但可用于句型be about to do.when.“即将做某事就在这时”。,Be quiet！The film is about to start.安静！电影马上开始了。,5一般现在时可表示按时刻表、日程表的安排所发生的将来的动作，也可用于状语从句中表示将来。,The next plane leaves at 6 pm.下一班航班晚上6点起飞。,.用所给动词的正确形式填空1The students _ (play) football in the park at the moment.2You _ always _(do) well.3When _ you _

13、(go) off to Guangzhou? Next Friday morning.4Whenever I visit him, he _(work) in his lab.5I hear all the hotels are very crowded. Where _ you _(stay) in Shanghai?,are playing,are,doing,are,going,is working,are,staying,落实提升,6It is half past eight now, but they _ still _(have) their supper at home.7Lad

14、ies and gentlemen, please fasten your seat belts.The plane _ (take) off.8Our train _ (leave) an hour later, so we dont have to hurry.,are,having,is taking,leaves,.单句改错(每小题仅有1处错误)1She is about to leave when some guests came._2If you will visit him, I will go with you._3The bus leave at 6：00._4I was s

15、eeing him off this afternoon._5The meeting is take place next Monday._,iswas,去掉第一个will,leaveleaves,wasam,is后加to,.补全句子1Ill call on some of my old friends while _ (待在上海),I am staying in Shanghai,2Catherine _ (正在等你) downstairs at the moment.3When _ (你动身去) that mountain village for a friendly visit? 4Te

16、chnology _ (不断变化) so rapidly that we have to work hard to keep up with it.5I _ (正要出去) when my uncle arrived.,is waiting for you,are you leaving for,is changing,was about to go out,6They _ (将带孩子们) to the zoo this Sunday.7If he _ (正在做实验) when you arrive, dont disturb him.8The plane to London _ (起飞)at 5：48 in the morning.Please get up early tomorrow morning.,are taking their children,is doing an experiment,takes off,Bye-bye！,