北师大版高中英语必修2 Unit4 Grammar参考课件

1、Conditionals条件句条件句Uint4 CyberspaceGrammarObjectives By the end of this lesson, you will be able to: discover the differences between the first and second conditionals and their rules use the second conditional to describe your ideal future lifeFirst Conditional(真实条件句真实条件句) We use the First Condition

2、al 1 to talk about possible future events which depend on other future eventsIf the rain stops, the match will begin.2 to give someone advice or an order, and to make a suggestion or a requestIf you feel sleepy, go to bed.Sentence patternsIf clauseMain clauseFirst ConditionalIf do/be will/wont+do/be

3、If do/be Imperative(祈使句祈使句)If I were Liu Xiang, I would train hard for the 2008 Olympic Games. If you (come) a few minutes earlier, you him.(meet) had come would have met If all the creatures on earth (disappear)in the future, human too (die out)disappeared/should disappear/were to disappearwould di

4、e outThese examples If I were Liu Xiang, I would train hard for the 2008 Olympic Games. If you had come a few minutes earlier, you would have met him. If all the creatures on earth disappeared/should disappear/were to disappear in the future, human would die out too.We use the Second Conditional 1)

5、to talk about impossible present situations 2) to talk about impossible past situations 3) to talk about imagined, impossible or unlikely events in the futureTask1 Group Work Sumarize sentence patterns Make sentences using the Zero Conditional or the First Conditional Second Conditionals If cause ma

6、in clausepresentpast future did(be用用were)should, would, could, might dohad doneshould, would, could,might have done(1) did (were)(2)were to do(3) should doshould, would, could, might doCTask 2 practice注注:在条件句中可省略在条件句中可省略If, 把把had, were, should 提到句提到句首。首。1._so busy, she would come to help you.A. Shou

7、ld my daughterB. If my daughter was not C. If my daughter were not D. If my daughter is2. _in your position, I would go.A. If I B. If I am C. If I was D. Were I D3. If my brother _here last Sunday, he _ me from going.A. had been; would have prevented B. had been; would prevent C. were; would prevent

8、 D. were; would have prevented A4 If he _in a day or two, I would wait for him.A. returns B. should have returned C. were to return D. have returnedCTask 3 Language in useImagine your ideal future. Task 4 Summary and Homework Who would say these things, a or b? 1 If I had the money, I would buy a new IBM co