2017英語(yǔ)中考知識(shí)點(diǎn)匯總
中考英語(yǔ)是對(duì)初中三年來(lái)學(xué)習(xí)成果的一個(gè)檢驗(yàn),也是對(duì)英語(yǔ)老師教學(xué)水平的檢測(cè)。接下來(lái)學(xué)習(xí)啦小編為你整理了2017英語(yǔ)中考知識(shí)點(diǎn)，一起來(lái)看看吧。
2017英語(yǔ)中考知識(shí)點(diǎn)：時(shí)間狀語(yǔ)從句
(1)時(shí)間狀語(yǔ)從句常用when, as, while, before, after, since, till, until, as soon as等連詞來(lái)引導(dǎo)。例如：
It was raining hard when got to school yesterday.
While he was doing his homework, the telephone rang.
As he walked along the lake, he sang happily.
He had learned a little Chinese before he came to China.
After he finished middle school, he went to work in a factory.
(2)在時(shí)間狀語(yǔ)從句里，通常不用將來(lái)時(shí)態(tài)，用現(xiàn)在時(shí)態(tài)表示將來(lái)的動(dòng)作或狀態(tài)。例如：
I’ll ring you up as soon as I get to New York.
I will tell him everything when he comes back.
He won’t believe it until he sees it with his own eyes.
(3)在帶有till或until引導(dǎo)的時(shí)間狀語(yǔ)從句的主從復(fù)合句里，如果主句用肯定式，其含義是“一直到……時(shí)”，謂語(yǔ)動(dòng)詞只能用延續(xù)性動(dòng)詞。如果主句用否定式，其含義是“直到……才……”, “在……以前不……”, 謂語(yǔ)動(dòng)詞可用瞬間動(dòng)詞。例如：
The young man read till the light went out.
Let’s wait until the rain stops.
We won’t start until Bob comes.
Don’t get off until the bus stops.
2017英語(yǔ)中考知識(shí)點(diǎn)：條件狀語(yǔ)從句
(1)條件狀語(yǔ)從句通常由if, unless引導(dǎo)。例如：
What shall we do if it snows tomorrow?
Don’t leave the building unless I tell you to.
(2)在條件狀語(yǔ)從句里，謂語(yǔ)動(dòng)詞通常用現(xiàn)在時(shí)態(tài)表示將來(lái)的動(dòng)作或狀態(tài)。例如：
I’ll help you with your English if am free tomorrow.
He won’t be late unless he is ill.
(3)“祈使句 + and (or)+ 陳述句” 在意思上相當(dāng)于一個(gè)帶有條件狀語(yǔ)從句的復(fù)合句。例如：
Hurry up, or you’ll be late.
=If you don’t hurry up, you’ll be late.
Study hard and you will pass the exam.
=If you study hard, you will pass the exam.
2017英語(yǔ)中考知識(shí)點(diǎn)：原因狀語(yǔ)從句
(1)原因狀語(yǔ)從句通常由because, since, as引導(dǎo)。例如：
He didn’t come to school because he was ill.
As it is raining, we shall not go the zoo.
Since you can’t answer the question, I’ll ask someone else.
(2)because表示直接原因，語(yǔ)氣最強(qiáng)。Because引導(dǎo)的原因狀語(yǔ)從句多放在主句之后。回答由why提出的問(wèn)題，只能用because。As和since語(yǔ)氣較弱，一般用來(lái)表示明顯的原因。由as和since引導(dǎo)的原因狀語(yǔ)從居多放在句首。例如：
------Why aren’t going there?
------Because I don’t want to.
As he has no car, he can’t get there easily.
Since we have no money, we can’t buy it.
(3)because和so不能同用在一個(gè)句子里。
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