每课一句：新概念英语第1册第89课
【往期回顾】
接下来，我们就来看看第89课的“每课一句”。
一、课文原文
Lesson 89 For sale
Good afternoon. I believe that this house is for sale.
That’s right.
May I have a look at it please?
Yes, of course. Come in.
How long have you lived here?
I have lived here for twenty years.
Twenty years! That’s a long time.
Yes, I have been here since 1976.
Then why do you want to sell it?
Because I have just retired. I want to buy a small house in the country.
How much does this house cost?
£68,500.
That’s a lot of money!
It’s worth every penny of it.
Well, I like the house, but I can’t decide yet. My wife must see it first.
Women always have the last word.
——选自《新概念英语》第一册，外语教学与研究出版社，1997年10月第1版
二、每课一句
I have lived here for twenty years.
本课继续学习现在完成时的用法，只是本课侧重学习的是标志词for和since的用法。两者都是后接表时间的成分，但有所区别。
一、for
for后接一段时间，即时间段。如：
I have lived here for ten years.
She has learned German for two months.
二、since
since后接具体时间，即时间点。如：
I have lived here since ten years ago.
She has learned German since two months ago.
He has been in China since 2009.
【注意】
1、虽然for和since后接的时间不一样，但其所在句子的谓语动词基本都会采用现在完成时，且该动词必须是持续动词，不能是瞬间动词。如：
错误：Jane has left Paris for five days.
正确：Jane has been away from Paris for five days.
瞬间动词可以用于现在完成时，但不能与一段时间连用。比如，我们可以说“Jane has left Paris”，但不能说“She has left Paris for five days”，因为leave是瞬间动词。所以，如果要后接一段时间，就必须把leave改为表状态可持续的“be away from”。
2、since除了可以后接时间点外，也可以后接句子。如：
They have moved to London since the war broke out.
Jack has never gone back to his hometown since he was ten.
三、更多拓展
Women always have the last word.
have the last word表示“有决定权；说了算；最后拍板”。
这句话用来喻指对话中的Nigel对于买房子这样的大事没有决定权，而是要由他老婆来拍板。Ian通过这句话，颇具调侃的口吻。
