高考英语状语从句50大核心考点（7）

特大难点重点辨别：另学生纠结的英语考点：

It+ be+……+that/since/before/when用法辨析

【对比句型】

  1. It is/It's/has been + 一段时间 + since + 从句（终止动词）意思是“自......以来已经多久了”。

       It is/It's/ has been + 一段时间 + since + 从句（延续或状态动词） 意思是“已经多久没......了”。

  2. It is/It's/ has been + 一段时间 + since + 从句（一般过去时） 
      It was + 一段时间 + since +从句（过去完成时） 
  3. It was + 一段时间 + before +从句（一般过去时） 意思是“过了多久才”。 否定句：不久就
      It will be + 一段时间 + before +从句（一般现在时） 意思是“要过多久才”。否定句：不久就

      It was not long before + 从句；不久就

  4. It is/was +强调部分+that/who…为强调句式。强调句

      It was +at  ten o’clock +that+主语+ 过去时  强调句

      It was+ 一段时间+ago+ that +主语+ 过去时  强调句

      It is/was not until … that …强调句

  5. It is/was +时间点+when…表示“当……时，时间是……”，when引导时间状语从句；

    It's three years since they got married.（他们已结婚三年了。） 
    She said it was three years since they had got married. （她说他们已结婚三年了。）
    It was three years before they got married.（三年后他们结了婚。） 
    It will be three years before the get married.（再有三年他们才能结婚）

 【考例】

 1.〖2010四川卷〗Because of the heavy traffic，it was already time for lunch break          shegot to her office.

      A. since            B.that             

      C. when          D. until

 2.〖2010陕西卷〗John thinks it won’t be long        he is ready for his new job.                

     A.when             B.after            

    C. before           D. since

CC

强化习题：

1. It was two years ________he realized the truth. w.w.w.k.s.5.u.c.o.m

2. It will be two years ________ the economic situation improves.

3. It was two years later ________ he realized the truth.

4. It is /has been two years ________ he lived here.

5. It was midnight ________ he arrived home.

6. It was at midnight ________ he arrived home.

7. It was not until midnight _______ he arrived home.

 A.before    B. when   C. since    D. that w.w.w.k.s.5.u.c.o.m

【答案与解析】

1、2两个小题都选A。 第一题意为：两年后他才得知真相。第二题意为：经济形式要等两年后才会有所好转。

【归纳】It was/ will be +一段时间+before+句子是高考一个重要考点。意为：多久之后才……

要注意：It will be +一段时间+before+句子，before引导的是一个时间状语从句，所以后面的从句要用一般现在时态表将来。

3.D 此题为强调句型。把It was…that去掉后，句子仍然成立：He realized the truth two years later.

4.C 本句意为：他不住在这儿已经两年了。

【归纳】为since意为自从某时或某事发生以来，故since后从句时，从句的时态应用一般过去时态，而主句应用现在完成时态。如表示某某事发生多久了，则用：It is/has been+一段时间+since+从句。

【注意】It is/ has been+一段时间+since+从句。在本结构中，从句的谓语动词如为延续性动词时，翻译时要从动作结束时算起。

5. B本句为定语从句，先行词为midnight,在从句中作状语。要注意与第6小题的区别，第6题为强调句型，故答案应为that。

6.D 再看下面两题：w.w.w.k.s.5.u.c.o.m

(1) It was the park ________ he first met his wife.

(2) It was in this park ________ he first met his wife.

第一题答案应为where,为定语从句；第二题答案为that, 为强调句型。

7.D本题亦为强调句型结构：Itwas not until…that…意为：直到……才……