2015年成人英语三级考试考点：时态

　　学位英语考试中重点语法知识主要包括：时态、语态、情态动词、虚拟语气、非谓语动词、从句、倒装句、强调句、主谓一致等。现在我们主要学习有关时态的语法知识点。 一般现在时可以代替将来时，用于时间和条件状语从句中。

　　我们需要特别注意以下几种情况和句型结构：

　　1.在“This is the first time…”结构中，后面的从句用现在完成时。

　　句子开头也可以用it代替this

　　例：This is the first time that I have met Jane.

　　2.一般现在时可以代替将来时，用于时间和条件状语从句中。

　　例如：

　　1)Return the book immediately to the library as soon as you _____ it.

　　A. finish B. are finished C. have finished D. are finishing

　　答案A。

　　2)Please be sure to telephone me the next time you _____.

　　A. will come B. would come C. shall come D. come

　　答案D。

　　3.在“It/This is +形容词最高级+名词后面的从句中，用现在完成时。”

　　例：This is one of the best books _____ on the subject.

　　A. that have ever been written B. which have ever been written

　　C. that has ever been written D. whatever have been written

　　答案为A。

　　4.在“It is/has been+时间段+since…后边用过去时。”

　　例：It has been twenty years since I left my hometown.

　　5.在“no sooner…than”和“hardly…when…”结构中，主句部分用过去完成时，从句部分用过去时。例如：

　　1)I had no sooner returned than he called.

　　2)We had hardly begun when we were told to stop.

　　6.在“It is (high) time后边的从句中用过去时。”

　　例：It is time that we had a rest.

　　7. 时态与时间状语：

　　时态

　　时间状语

　　一般现在时

　　every…, sometimes, at…, on Sunday等

　　一般过去时

　　yesterday, last week, an hour ago, the other day, in 1982, just now等

　　一般将来时

　　next…, tomorrow, in+一段时间, before+时间点等

　　现在完成时

　　for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently等

　　过去完成时

　　before, by+过去的时间, until, when, after, once等

　　过去进行时

　　this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while等

　　将来进行时

　　soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening