來源:網絡資源 2022-09-13 14:19:11
賓語從句的三種基本形式:
1.從屬連詞that引導
that無詞義,不充當句子成分,可省略。
如:He told me (that) he was ill.他告訴我他生病了。
注意:以下情況that不能省略
①主句的謂語動詞連接多個賓語從句時,第一個that可以省略,而其他的that不能省略。
如:I think (that) it will be sunny tomorrow and that we will go shopping.我認為明天是晴天,我們將去購物。
②that 引導的賓語從句作介詞賓語時,that不能省略。
如:I know nothing about her except that she is a teacher.我對她一無所知,只知道她是個老師。
③that引導的賓語從句和主句的謂語動詞之間有插入語時,that不能省略。
如:I remembered,first of all,that I lost my USB.我記起來了,尤其重要的是,我弄丟了優盤。
④that 從句位于句首時,that不可省略。
如:That he ever did such a thing I simply don't believe.我簡直不相信他做了這樣的事。
⑤當賓語從句的主語是his,that或有his和that修飾時。
如:Lucy that me that that was why she was late.露西告訴我那就是她遲到的原因。
2.從屬連詞if/whether引導
一般情況下可以相互替換,在口語中多用if,不充當句子成分,有具體的含義“是否”。
如:I don't know if you can help me.我不知道你能否幫助我。
I doubt whether he will get there on time.我懷疑他能否準時到那兒。
注意:以下情況只能用whether不可用if
①與or not 連用
如:I wonder whether it is true or not.我想知道它是真是假。
②在介詞后
如:It depends on whether it is going to rain.它取決于是否天會下雨。
③在不定式前
如:Whether to go there or not hasn't been decided.是否去那兒還沒有決定下來。
④if 引導的賓語從句如果會引起歧義,應避免用if而用whether
如:Please let me know if you want to go.
Please let me know whether you want to go.
3.連接代詞或連接副詞引導
連接代詞:who,whom,whose,what,which,whoever,whatever,whichever
連接副詞:where,when,how,why
在句中充當句子成分,不可省略。
如:You can do what you want.你可以做你想做的。
I don't know whose box this is.我不知道這是誰的盒子。
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