江苏省海头高级中学高中英语 Unit3 Grammar and usage教案 新人教版选修6.doc

江苏省海头高级中学高中英语 unit3 grammar and usage教案 新人教版选修6_step2 learning 时间 从句 主句与现在事实相反if +主语+动词的过去式(be-were)主语+ would / could/ might+动词原形与过去事实相反if+主语+had +过去分词主语+ would/ could/might + have+过去分词与将来事实相反if+主语+were to/(should) + 动词原形主语+ would / could/ might+动词原形注: 当从句的if省略时, 句子要倒装, 如if i were you, i would not do that. _, i would not do that.在if i /he/she/it 之后, 可用were代替was。两者在意义上没有区别, 但是were更为正式, 特别是在称述心存怀疑的事情时:if she were ready, we would go.在与将来事实相反的条件从句中,我们可以用were to或should +do来表示,如:if i were to fail my english test, i would have to take it again at the end of the term.if he should come tomorrow, i would talk to him about it. 虚拟条件句中的省略与倒装在非真实条件句中,如果有were, had, should, 我们可以将if省略,把这些词置于句首,采用倒装形式,如: if i should meet her, i would tell her. = _, i would tell her. if i were in your position, i would do it better. = _, i would do it better. if they had made preparations, they would have succeeded.=_, they would have succeeded.step3 further learning 错综时间条件句非真实条件句中, 主句谓语动词所表示的动作和条件从句中谓语动词所表示的动作并不同时发生, 这时动词的形式并不完全按照上述表格来进行, 而需要按照各自的时间来调整, 这样的句子就叫错综时间条件句。e.g. 1) if you had followed the doctors advice, then you would be all right now.2) if i hadnt finished my composition by now, i would be working on it tomorrow.3) if she had prepared well for her lessons yesterday, she wouldnt have so many difficulties now. 含蓄条件句有时一个假设的情况并不用条件从句表示,而用其它方式来表示,这样的句子叫含蓄条件句。1. 用with, without等介词短语或分词短语或者独立主格结构来代替条件从句。we might have died without your help. =we might have died if you hadnt helped us.having known in time, we could have stopped it. = if we had known in time, we could stopped it.step4 高考链接1. i have no idea what he will do with them all and it took up a lot of time. (p42)考点1 idea作先行词时的同位语从句。考例 do you have any idea _ is actually going on in the classroom? (辽宁2005)athat bwhat cas dwhich 考点2 take up 考例1 after he retired from office, rogers _ painting for a while, but soon lost interest. (山东2006)a. took up b. saved up c. kept up d. drew uptake up在这里是“开始学习”的意思。save up储蓄；keep up维持，继续； draw up拟定，起草。step5 discussion:what would you do if you had a?magic lantern, magic brush,magic stick, time machinestep6巩固练习1. _ for the free tickets, i would not have gone to the films so often. a. if it is not b. were it not c. had it not been d. if they were not2. he came late, otherwise he _ the first bus. a. caught b. would catch c. would have caught d. had caught3. mary was going to the wedding if her friend _ her. a. hadnt called on b. didnt call at c. didnt call on d. hadnt called at4. -lets stop watching the boring tv programme, jack! -if you dont watch it, i _, either. a. dont b. wont c. am not d. stop5. -shall i tell john about the bad news? -no, you _. i think that will make him sad. a. neednt b. wouldnt c. shouldnt d. mustnt6. why did you throw the bottle out of the window? you _ somebody. a. might hurt b. could have hurt c. would hurt d. must have hurt 7. from what i hear about their hotel and the weather, they _ their holiday very much. a. would have enjoyed b. shouldnt have enjoyed c. neednt have enjoyed d. cant have enjoyed 8. -did you hear me come in last night? -no, i _ asleep. a. cant be b. must be c. must have been d. couldnt have been9. -ill pay you by cheque monthly. -id rather you _ me cash weekly. a. pay b. will pay c. are to pay d. paid10. the doctor said, “sir, you _ be sitting in this waiting room. its for the children only.” a. oughtnt to b. cant c. mustnt d. wont11. -did wei hua have breakfast before going to school yesterday? -no, but i think he _ have. a. will b. may c. should d. must12. -mum, may i got out and play? -no, you _ . a. wont b. dont c. arent able to d. cant 13. they didnt want to come with us at first. but then we _ persuade them. a. had managed to b.