來源:網(wǎng)絡資源 2022-03-10 20:12:22
由于賓語從句是由陳述句、一般疑問句或特殊疑問句等轉換而來,因此,它的連接詞也分三種情況:
1、從句是陳述句:用連詞that引導。that沒有實在意義,也不作任何成分,經(jīng)常省略。
例如:I think (that) he is right.
這里需要提醒同學們注意,不能省略that的情況:
1) and連接兩個或兩個以上的賓語從句,第一個從句中的that可省略,后面的that不能省。
如,I know(that)he is from America and that he likes playing basketball.
2)that引導的賓語從句作except, but, besides, in等介詞賓語時,that不能省。
如,I know nothing about him except that he is a doctor.
3)主句與that從句之間有插入語,that不可省。
如,I think, first of all, that we should make a plan.
4)若賓語后面有賓語補語,則賓語從句要放到補語之后,在賓補前用it作形式賓語.常常這樣用的動詞有find,feel,consider,make,believe等。
如,I consider it necessary that a plan should be made before doing the work.
2、從句為一般疑問句,用連詞whether或if引導。
例如I wonder whether/if he will come here tomorrow.
考點:if和whether在用法上的區(qū)別:
1)if可以引導條件狀語從句,whether不能。
如I will go to the park if it doesn’t rain tomorrow.
2)在下列情況時只能用whether:
用作介詞的賓語時;用在不定式前面時;whether引導的從句放在句首時。
如It depends on whether he has enough money.這取決于他是否有足夠的錢。
3)whether常與or not連用。
如He asked whether they would come or not.他問他們是否該來。
3、從句為特殊疑問句,用連接代詞who,what,which和連接副詞when,where,why,how引導。
如:(1)I don’t know when they will leave for Shanghai.我不知道他們什么時候將去上海。
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