时间、条件和让步状语从句(陕西省西安市)

课件11张PPT。语法项目时间、条件和让步状语从句1．时间状语从句注意点___________l was walking down the street，I saw some policemen．
_______they heard the news，they were surprised．
______the child was playing with his toys，his parents were watching TV.
They shouted slogans ____they passed the square.when表示从句动作和主句动作同时发生，或先于主句动作；
while表示从句的动作与主句动作同时发生，并有延续的含义；
as从句动作与主句动作相并发生，常译为“边…边…” 。When/WhileWhenWhileas1) when／while／as的用法。He had hardly arrived when it began to snow．
Hardly _____________when it began to snow．
We had hardly walked into the hall when the lecture started．
Hardly _______ walked into the hall when the lecture started．
_______________she gone to sleep than the telephone rang once more．
_______________the boy reached the door than he came back．had he arrivedhad weNo sooner hadNo sooner had2)含有关连词组hardly…when和no sooner…than的两种句子结构表示“一……就……”。当hardly或no sooner位于句首时，要倒装。3)一些表示时间的名词词组, 如the moment, each time, every time, the first time, the year等,也用于引导时间状语从句，这时它们担当着连接词的功能。______________he went to Shanghai, he paid a visit to his former teacher．
A. For the first time B. The first time
___________l saw him, I thought of his father．
A. The moment B. At the momentThe first timeThe momentEach time he came, he would bring us a lot of flowers．2．条件状语从句注意点You will improve your oral English if you keep on practising．
He will never make progress _______he works hard．
A. if B. unless
If I _____you, I would give up smoking at once．
A. was B. am C. is D. were1) if和unless是最常用的条件从句连接词，unless在意义上等于“if…not”，并且语气较强。if可用于虚拟条件句，unless则一般不用于虚拟条件句。unlesswere2) in case后接一般现在时、一般过去时或should，它所引导的从句为主句的动作提供理由。Please take your raincoat along with you in case it rains.
He always slept by the phone in case she rang during the night．
Don't go out tomorrow morning in case Mr Li should come to visit you．3．让步状语从句注意点Whatever happens，we will not change our mind．
No matter what happens，we will not change our mind．
However difficult the work is, we will try our best to finish it in time.
No matter how difficult the work is, we will try our best to finish it in time.1) whatever (whenever, however…)和no matter what (when，how…)这两种形式都可引导让步状语从句，意义无差异。2) 形容词／副词／名词+as／though可引导一个让步状语从句，表示强调。Though she is young, she knows so much about life.
Young as／though she is, she knows so much about life.
Though they fought bravely, they had no chance of winning.
Bravely as／though they fought, they had no chance of winning.
Though he is a child, he can speaks three languages.
Child as／though he is, he can speaks three languages.3) even if／even though／although／though都作“虽然”、“尽管”解释，但是even if和even though所表示的让步语气最强，although次之，though最弱。He will never tell you the truth even if he knows it．
The old woman is unhappy though she has a lot of money．Fill in the blanks with conjunctions.1) I was persuaded to do the job, ________________________ I didn't want to.
2) I talked to Henry _____ the football players were resting in the middle of the game.
3) The students listened carefully _______ they should fail to follow the speaker.
4) _________ she got anything to eat, she would save it for her children.
5) They promised to wait _________ the clock struck twelve.even though/ although / though whilein caseEach timeuntil/till6) Hard _____ the task is, he is determined to finish it.
7) _________________ she may have told you, I still think she is not to be trusted.
8) I will not buy it _______ the price is fair.
9) The parent birds will not go their separate ways _______ the young birds leave the nest. 10) The pianist waited for silence _______ he began to play.as Although / Though unlessuntil/tillbefore