初中英语语法用法讲解
【语法since和for用法讲解】
比较since和for
Since 用来说明动作起始时间,for用来说明动作延续时间长度。例如:
I have lived here for more than twenty years.我住在这儿二十多年了。
I have lived here since I was born. 我从出生起就住在这儿了。
注意:并非有for 作为时间状语的句子都用现在完成时。
I worked here for more than twenty years. (我现在已不在这里工作。)
I have worked here for many years.(现在我仍在这里工作。)
注意:用句型转换的方法,很容易排除非延续动词在有for/since结构的完成时中的误用。
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 get married six years ago, and is still getting married now.
显然,第二句不对,它应改为 Harry got married six years ago. 或 Harry has been married for six years.
同学们,看看since和for的用法比较,大家有没有清楚一点呀,多多看看哦。
初中英语分词与连词的'语法
【分词与连词的】在学习的时候需要注意的是,分词的主语和主句的主语必须为同一个哦!
有时为使分词短语与主句关系更清楚,可在分词前加连词。 连词有: when,while,if though,after, before, as. 但分词的主语和主句的主语必须为同一个,如:
While waiting there, he saw two pretty girls come out of the building.
waiting 和saw 的主语相同。
温馨提示:同学对这个如果还不是很理解的话,就不可以再偷懒了哦!
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