快要考試了，你準(zhǔn)備得怎么樣啦?出國(guó)留學(xué)網(wǎng)小編為你精心準(zhǔn)備了2019上半年英語(yǔ)六級(jí)語(yǔ)法知識(shí)：一般現(xiàn)在時(shí)代替將來(lái)時(shí)，希望能夠幫助到你，想知道更多相關(guān)資訊，請(qǐng)關(guān)注網(wǎng)站更新。
英語(yǔ)六級(jí)語(yǔ)法知識(shí)：一般現(xiàn)在時(shí)代替將來(lái)時(shí)
時(shí)間狀語(yǔ)從句，條件句中，從句用一般現(xiàn)在時(shí)代替將來(lái)時(shí)
When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, the moment, the minute, the day, the year, immediately
He is going to visit her aunt the day he arrives in Beijing. 他一到北京，就去看他姨媽。
典型例題
(1)He said he________me a present unless I_______ in doing the experiment.
A. had not given; had not succeeded B. would not give; succeed
C. will not give; succeed D. would not give; will succeed.
答案B. 在時(shí)間，條件或讓步主語(yǔ)從句中一般不用將來(lái)時(shí)。本題有He said，故為過(guò)去式。主句用將來(lái)時(shí)，故選B. 此處用一般過(guò)去式代替了過(guò)去將來(lái)時(shí)。
(2) 表示現(xiàn)在已安排好的未來(lái)事項(xiàng)，行程等活動(dòng)。
The museum opens at ten tomorrow. 博物館明天10點(diǎn)開門。(實(shí)際上每天如此。)
英語(yǔ)六級(jí)語(yǔ)法知識(shí)：一般現(xiàn)在時(shí)代替完成時(shí)
1) 有些動(dòng)詞用一般現(xiàn)在時(shí)代替完成時(shí)：
hear, tell, learn, write , understand, forget, know, find , say, remember.
I hear (= have heard) he will go to London.
I forget (=have forgotten) how old he is.
2) 句型 " It is … since…"代替"It has been … since …"
3) It is (= has been) five years since we last met.
英語(yǔ)六級(jí)語(yǔ)法知識(shí)：過(guò)去完成時(shí)
1) 概念：表示過(guò)去的過(guò)去
----|-------|-----|---->其構(gòu)成是had +過(guò)去分詞構(gòu)成。
那時(shí)以前 那時(shí) 現(xiàn)在
2) 用法
a. 在told, said, knew, heard, thought等動(dòng)詞后的賓語(yǔ)從句。
She said (that) she had never been to Paris.
b. 狀語(yǔ)從句
在過(guò)去不同時(shí)間發(fā)生的兩個(gè)動(dòng)作中，發(fā)生在先，用過(guò)去完成時(shí);發(fā)生在后，用一般過(guò)去時(shí)。
When the police arrived, the thieves had run away.
c. 表示意向的動(dòng)詞，如hope, wish, expect, think, intend, mean, suppose等，用過(guò)去完成時(shí)表示"原本…，未能…"
We had hoped that you would come, but you didn't.
3) 過(guò)去完成時(shí)的時(shí)間狀語(yǔ)before, by, until , when, after, once, as soon as。
He said that he had learned some English before.
By the time he was twelve, Edison had began to make a living by himself.
Tom was disappointed that most of the guests had left when he arrived at the party.
典型例題
The students ___ busily when Miss Brown went to get a book she ___ in the office.
A. had written, left B，were writing, has left C. had written, had left D. were writing, had left
答案D. "把書忘在辦公室"發(fā)生在"去取書"這一過(guò)去的動(dòng)作之前，因此"忘了書"這一動(dòng)作發(fā)生在過(guò)去的過(guò)去，用過(guò)去完成時(shí)。句中when表示的是時(shí)間的一點(diǎn)，表示在"同學(xué)們正忙于……"這一背景下，when所引導(dǎo)的動(dòng)作發(fā)生。因此
前一句應(yīng)用過(guò)去進(jìn)行時(shí)。
注意： had no … when 還沒等…… 就……
had no sooner… than 剛…… 就……
He had no sooner bought the car than he sold it.