八下英语知识点初中英语知识点大全:since和fo

  有点since和for

  

  Since 可以这说明动作类启始日子,for可以这说明动作类首注日子长度。假如:

  

  I have lived here for more than twenty years.我住再次有二几十年了。

  

  I have lived here since I was born. 我真想刚出生起就住再次有了。

  

  注意:只是有for 看做日子状语的句子都用现下落成时。

  

  I worked here for more than twenty years. (我现下不再在现在运转。)

  

  I have worked here for many years.(现下我仍在现在运转。)

  

  注意:用句型转换的的方法,很极易除掉非首注动词在有for/since结构特征的落成时中的误用。

  

  1)(对) Tom has studied Russian for three years. = Tom began to study Russian three years ago, and is still studying it now.

  

  2)(错) Harry has got married for six years. = Harry began to tet married six years ago, and is still tetting married now.

  

  很明显,第二句不影响,它应换成 Harry got married six years ago. 或 Harry has been married for six years.

  

  重要性大多:

  

  

  

  

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