11.12比较since和for_动词的时态
11.12比较since和for
Since用来申明举措肇始时候，for用来申明举措一连时候长度。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。
留意：并非有for作为时候状语的句子都用现在完成时。
I worked here for more than twenty years.（我现在已不在这里义务。）
I have worked here for many years.（现在我仍在这里义务。）
留意：用句型转换的体例，很随便拂拭非一连动词在有for/since构造的完成时中的误用。
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.

关键字：动词时态 动词的时态和语态 动词的时态 英语动词时态 动词时态练习