AEIS考试研究中心：同义词since和for的区别用法

　　目前2017S-AEIS考试培训刚刚拉开帷幕，报名新加坡AEIS考试留学的同学们不要错过了这个最佳阶段，这时来了解新加坡对备考2017S-AEIS考试还是很有帮助的。AEIS考试研究中心老师提醒大家要学会区分同义词，熟练掌握它们的用法，避免陷入陷阱。本期老师为大家讲讲since和for的区别。

　　Since 用来说明动作起始时间，for用来说明动作延续时间长度。

　　I have lived here for more than twenty years.

　　I have lived here since I was born..

　　My aunt has worked in a clinic since 1949.

　　Some new oilfields have been opened up since 1976.

　　I have known Xiao Li since she was a little girl.

　　My brother has been in the Youth League for two years.

　　I have not heard from my uncle for a long time.

　　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。)

　　小窍门：当现在完成时+一段时间，这一结构中，我们用下面的公式转化，很容易就能排除非延续动词在完成时中的误使。

　　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.

　　大家在平时一定要多做AEIS考题，加强实战训练。

　　AEIS考试研究中心老师为大家提供更多的AEIS真题模拟培训和国内aeis考试培训，有需要了解AEIS考试时间的同学和家长朋友们可以直接向我们咨询哦!