whether和if均可用来引导宾语从句

1、精品文档whether 和 if均可用来引导宾语从句，表示“是否”，如：dont know whether/if I will be able to come.我不知道我是否能来 .She asked me whether/if I was interested in working for her.她问我是否有兴趣为她工作。但也有差别：1、 whether 可以与 or或 or not连用，而 if不可以，如：He wondered whether he should waitor go .I don tknow whether he will come. or not。2 介词之后用 wh

2、ether ,不用 if .It dependson whether you will agree .3 不定式前面用 whether不用 if .I wonder whetherto stay here .5 当从句或主句放于句首时，用whether，不用 if .Whether this is true or not, I cant say .Whether Ill have time to go with you I am not sure 6 引导表语从句用 whether ， 不用 if .The problem iswhether we should go home or not8

3、 作 discuss的宾语，用 whether， 不用 if .They are discussingwhether they should open the door9、当表示“如果”时用if,而不用 whether强化练习：1. The question hasnotbeen answered _Taiwan will beincluded on the Olympic torch relay route.AthatBwhetherCwhichDif2. You have not yet answered my question _ I can join in the party toni

4、ght or not.A.whetherB.ifC. thatD. which3 I d like to invite you to a party this evening. Thank you, but _ I llbe free I m not sure at the moment.A. whileB. ifC. whenD. whether4-What are you anxious about?-_。1欢迎下载精品文档A. If we succeed B.That we can succeed C. Do we succeed D.Whether we can succeed5. O

5、nly when _ the painting_ decide _the paintingis worth buying.A. he sees, he can ,whetherB. does he see, can he,ifC. he sees, can he ,whetherD. sees he, he can,that6. _ English is his favourite subjectA. I asked him ifB. I asked him that whetherC. Iasked him thatD. I asked him which7. _ theyll go to

6、the Summer Palace _ the weather.A.If;depends onB.Whether;depends uponC.Whether; depended onD. If; depended upon8.Itisn t quite_ _ he willbe present at the meeting.A.sure;whetherB.sure;ifC.certain;whetherD. certain; that9. _ the 2008 Olympic will be held in Beijing is not known yet.A. WhetherB. IfC.

7、WheneverD. That10. No one was sure _ he would be asked to speak next year.A. whenB. whetherC. whatD. how11. It is still a question to us all _ there is any living thing in some other places in the space.A. whetherB. whichC. whatD. where12. I doubt _ he will come here on time.A. thatB. whetherC. when

8、D. where13.Thepointis not who said the words, _ they are trueor not.A. but whetherB. and whetherC. but howD. andhow14. “What did he ask you?”“_ I would be late.”A. ThatB. WhenC. WhereD. Whether15. He treated all the people around him,_he knew or he didnt know,_.A. if, friendlyB. whether, friendlyC. if, in a friendly way D. whether, in a friendly way。2欢迎下载