引導(dǎo)賓語從句的引導(dǎo)詞主要有三類，連詞，代詞，和副詞，這三類下又有不少的劃分，在學(xué)習(xí)的過程中難免令人難以記憶，滬江小編梳理這三類引導(dǎo)詞及其用法，并附上一些例句，希望能給學(xué)習(xí)者們帶來幫助。

三類引導(dǎo)詞：
連詞：that ,whether, if
代詞：who, whose, what ,which
副詞：when ,where, how, why 等。

一.連詞

①that:that 在大多數(shù)情況下可以省略，但在以下幾種情況下不可以省略：

1.動(dòng)詞后接多于兩個(gè)由that引導(dǎo)的賓語從句時(shí)，第一個(gè)that可省，但后面的that不可省
eg.He said (that) you were too young to understand the matter and that he was asked not to tell you.

2.當(dāng)主句的謂語動(dòng)詞與that賓語從句之間有插入語時(shí)，that一般不可省
eg.Just then I noticed, for the first time, that he prepared to talk to us.

3.當(dāng)that從句是雙賓語中的直接賓語時(shí)，that不可省
eg.I can’t tell him that his mother died.

4.當(dāng)that置于句首時(shí)
eg.That our team will win，I believe.

② whether&if ：一般情況下兩者可以互換，但在以下幾種情況下兩者不能互換：

只能用whether：
1. 在帶to的不定式前
eg.We decided whether to help him.

2. 在介詞的后面
eg.I’m thinking of whether we should help him.

3. 在動(dòng)詞后面的賓語從句時(shí)
eg. We discussed whether we should help him.

4. 直接與or not連用時(shí)
eg. I can’t say whether or not they will help him.

只能用if：
引導(dǎo)的表假設(shè)的從句：
eg. He will be saved if we help him.

引導(dǎo)的表否定的從句:
eg. He asked if I didn’t help him.

3. 直接使用even if和as if
eg. He talks as if he has known all about it.

二.連接代詞：who,whom,whose,which,what
eg. Can you tell me who you want to help?

三.連接副詞有：when,where,why,how等
eg. All of us don't know where he lives.

以上就是小編為大家整理的賓語從句的三類引導(dǎo)詞了，內(nèi)容比較多，不知道大家有沒有被繞暈?zāi)?？其?shí)啊，雖然這些知識(shí)點(diǎn)看上去復(fù)雜，但都是在日常學(xué)習(xí)中非常常見的內(nèi)容，只要平常學(xué)習(xí)時(shí)多留個(gè)心，將學(xué)習(xí)重點(diǎn)放到整理和梳理上，理清思路，就能慢慢掌握知識(shí)點(diǎn)了。