2017英語中考知識點匯總
中考英語是對初中三年來學習成果的一個檢驗,也是對英語老師教學水平的檢測。接下來學習啦小編為你整理了2017英語中考知識點，一起來看看吧。
2017英語中考知識點：時間狀語從句
(1)時間狀語從句常用when, as, while, before, after, since, till, until, as soon as等連詞來引導。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)在時間狀語從句里，通常不用將來時態(tài)，用現(xiàn)在時態(tài)表示將來的動作或狀態(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引導的時間狀語從句的主從復合句里，如果主句用肯定式，其含義是“一直到……時”，謂語動詞只能用延續(xù)性動詞。如果主句用否定式，其含義是“直到……才……”, “在……以前不……”, 謂語動詞可用瞬間動詞。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英語中考知識點：條件狀語從句
(1)條件狀語從句通常由if, unless引導。例如：
What shall we do if it snows tomorrow?
Don’t leave the building unless I tell you to.
(2)在條件狀語從句里，謂語動詞通常用現(xiàn)在時態(tài)表示將來的動作或狀態(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” 在意思上相當于一個帶有條件狀語從句的復合句。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英語中考知識點：原因狀語從句
(1)原因狀語從句通常由because, since, as引導。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，語氣最強。Because引導的原因狀語從句多放在主句之后。回答由why提出的問題，只能用because。As和since語氣較弱，一般用來表示明顯的原因。由as和since引導的原因狀語從居多放在句首。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不能同用在一個句子里。
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