1、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n_l was walking down the street，I saw some policemenn_they heard the news，they were surprisedn_the child was playing with his toys，his parents were watching TV.nThey 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
2、作相并发生，常译为“边边”。When/WhileWhenWhileas1)whenwhileas的用法。nHe had hardly arrived when it began to snownHardly _when it began to snownWe had hardly walked into the hall when the lecture startednHardly _ walked into the hall when the lecture startedn_she gone to sleep than the telephone rang once moren_the
3、boy reached the door than he came backhad he arrivedhad weNo sooner hadNo sooner had2)含有关连词组hardlywhen和no soonerthan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。n_he went to Shanghai,he paid a visit to his
4、former teachernA.For the first time B.The first timen_l saw him,I thought of his fathernA.The moment B.At the momentThe first timeThe momentEach time he came,he would bring us a lot of flowers2条件状语从句注意点nYou will improve your oral English if you keep on practisingnHe will never make progress _he work
5、s hardnA.if B.unlessn If I _you,I would give up smoking at oncenA.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“ifnot”，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。nPlease take your raincoat along with you in case it rains.nHe always slept
6、by the phone in case she rang during the nightnDont go out tomorrow morning in case Mr Li should come to visit you3让步状语从句注意点nWhatever happens，we will not change our mindnNo matter what happens，we will not change our mindnHowever difficult the work is,we will try our best to finish it in time.nNo mat
7、ter 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+asthough可引导一个让步状语从句，表示强调。nThough she is young,she knows so much about life.nYoung asthough she is,she knows so much about life.nThough they fou
8、ght bravely,they had no chance of winning.nBravely asthough they fought,they had no chance of winning.nThough he is a child,he can speaks three languages.nChild asthough he is,he can speaks three languages.3)even ifeven thoughalthoughthough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，tho
9、ugh最弱。nHe will never tell you the truth even if he knows itnThe old woman is unhappy though she has a lot of moneyFill in the blanks with conjunctions.n1)I was persuaded to do the job,_ I didnt want to.n2)I talked to Henry _ the football players were resting in the middle of the game.n3)The students
10、 listened carefully _ they should fail to follow the speaker.n4)_ she got anything to eat,she would save it for her children.n5)They promised to wait _ the clock struck twelve.even though/although/though whilein caseEach timeuntil/tilln6)Hard _ the task is,he is determined to finish it.n7)_ she may have told you,I still think she is not to be trusted.n8)I will not buy it _ the price is fair.n9)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
