英语六级语法:特定句型知识点

2014-02-14 11:12:13 字体放大:  

【摘要】掌握好英语语法对于同学们学好英语有很重要的作用,小编为大家整理了英语六级语法:特定句型知识点,希望大家喜欢。

since和for的用法:

since 用来说明动作起始时间,for用来说明动作延续时间长度;

eg:I have lived here for more than twenty years.

I have lived here since I was born.

for后面多接一段时间,而since后面则接一个时间点,若since后面也出现时间段,则在时间段后加ago;

eg: I have lived here for twenty years ago.

错句:I have worked here since twenty years.

since句型:

It is +一段时间+ since从句,since从句要用一般过去时;

eg:It is two years since I became a postgraduate student.

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