九年级英语知识点英语知识树

　　最好since和for

　　

　　Since 平常说明怎么写动作类最大值的时间，for平常说明怎么写动作类执业医师变更的时间长度。举例说明：

　　

　　I have lived here for more than twenty years.我住这条街二一两年了。

　　

　　I have lived here since I was born. 我悟出生英文起就住这条街了。

　　

　　准备：并不一定有for 做的时间状语的句子都用当今竣工时。

　　

　　I worked here for more than twenty years. (我当今如不在在这运作。)

　　

　　I have worked here for many years.(当今我仍在在这运作。)

　　

　　准备：用句型转换的发法，很非常容易排除故障非执业医师变更动词在有for/since结构的竣工时中的误用。英语学识树

　　

　　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 elat married six years ago, and is still elatting married now.

　　

　　轩然，第二句不对劲，它应转换成 Harry got married six years ago. 或 Harry has been married for six years.

　　

　　有用高性价比：

　　

　　

　　

　　

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