2018考研英語語法摘抄
從屬連詞從屬連詞是用來引導(dǎo)從句的。
1.連詞that, if, whether，連接代詞what, which, who, whom, whose以及連接副詞how, when, why, where可用來引導(dǎo)名詞從句，充當(dāng)主語、表語、賓語等。非正式文體中的賓語從句常省略that：
I think (that) he’ll be back in an hour. 我認(rèn)為他一小時(shí)后就會(huì)回來。
Who they are doesn’t matter much. 他們是誰沒什么大關(guān)系。
Can you tell me where he is? 你能告訴我他在哪兒嗎?
He asked me if/whether I knew John. 他問我是否認(rèn)識(shí)約翰。
此外，that, which, who, whom, whose, when, why, where等還可以引導(dǎo)定語從句。
2.連詞when, while, before, after, till/until, since, as soon as等引導(dǎo)時(shí)間狀語從句：
She said hello to me when she saw me. 她看到我的時(shí)候，和我打了招呼。
I’ll wait here until you come back. 我將在這里等你回來。
3.連詞if, unless引導(dǎo)條件狀語從句;because, as, since引導(dǎo)原因狀語從句：
I’ll help her if she asks me to. 如果她要求我，我就幫助她。
I won’t help her unless she asks me to. 除非她要求我，否則我不會(huì)幫她。
He didn’t come because he was ill. 因?yàn)樗×�，所以沒來。
As he hasn’t appeared yet, we shall start without him. 既然他還沒有出現(xiàn)，我們就先開始吧。
Since everybody is here, let’s begin. 既然大家都到了，咱們就開始吧。
4.連詞in order than, so that引導(dǎo)目的狀語從句;so…that…引導(dǎo)結(jié)果狀語從句：
I locked the door in order that we might continue our discussions undisturbed. (=I locked the door in order to continue our discussions undisturbed.) 我把門鎖上了，以便我們可以繼續(xù)討論而不受打擾。
The car ran so fast that I couldn’t see who was in it. 汽車跑得那么快，我沒看清誰坐在里面。
5.連詞than, as…as…, not as/so…as…用來引導(dǎo)比較狀語從句：
He is better educated than his brother. 他比他兄弟受的`教育好。
He is as well educated as his brother. 他和他兄弟受的教育一樣好。
He is not as/so well educated as his brother. 他沒有他兄弟受的教育好。
6.連詞although, though 引導(dǎo)讓步狀語從句;where, wherever 引導(dǎo)地點(diǎn)狀語從句：
I’ll go wherever you go. 不管你去哪兒，我就去那兒。
Stay where you are! 原地別動(dòng)!
Though/Although she is rich, she’s not happy. 盡管她富有，但她并不幸福。
一般來說，連詞性質(zhì)的連接詞連接兩個(gè)分句或引導(dǎo)一個(gè)從句，兩個(gè)分句或主從復(fù)合句之間用逗號(hào)連接。
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