Mr Hill: Good afternoon. I believe that this house is for sale（待售）.
Mr West: That’s right.
Mr Hill: May I have a look at it please?
Mr West: Yes, of course. Come in.
Mr Hill: How long have you lived here?
Mr West: I have lived here for twenty years.
Mr Hill: Twenty years! That’s a long time.
Mr West: Yes, I have been here since 1947.
Mr Hill: Then why do you want to sell it?
Mr West: Because I have just retired. I want to buy a small house in the country.
Mr Hill: How much does this house cost?
Mr West: ￡6850.
Mr Hill: That’s a lot of money!
Mr West: It’s worth every penny of it.
Mr Hill: Well, I like the house, but I can’t decide yet. My wife must see it first.
Mr West: Women always have the last word.
伊 恩: 是的。
伊 恩: 可以，当然可以。请进。
伊 恩: 我在这里住了20年了。
伊 恩: 是啊，从1976年起我就住在这里。
伊 恩: 因为我刚退休。
伊 恩: 68,500英镑。
伊 恩: 它确确实实值这么多钱。
伊 恩: 女人总是最后说了算的。
1．I believe that this house is for sale. 我想这房子是要新概念的吧！
I believe you.
I believe that he has already gone to London.
2．How long have you lived here? 您在这里住了多长时间？
3．since 1976, 从 1976年起。
4．How much does this house cost? 这座房子卖多少钱？
how much常用于询问东西的新概念。 cost是指得到一件东西所花费的钱，其真正的价值可能低于或高于所要的价。这种新概念主要是指商店内的标价或货主索要的新概念。相比之下，worth (prep.)主要是指某物的本身价值。
5．…I can'T decide yet．……我还不能决定。
modal verb （用于请求许可）可以
sell (sold, sold)
cost (cost, cost)
现在完成时还可以描述发生在过去且一直延续到现在的动作，这种动作甚至有可能延续下去。在这种情况下，它一般与for+ 一段时间、since+ 某个时间点连用。
请注意：for+ 一段时间表示某个动作持续多长时间；since+ 某个时间点表示某个动作是何时开始的。
六、lesson 90 练习答案
1 Did the sun set at twenty past seven?
The sun didn't set at twenty past seven.
2 Did he eat his lunch at one o'clock?
He didn't eat his lunch at one o'clock.
3 Did they do their homework last night?
They didn't do their homework last night.
4 Did he come by car this morning?
He didn't come by car this morning.
5 Did the sun rise at half past five?
The sun didn't rise at half past five.
6 Did you swim across the river yesterday?
We didn't swim across the river yesterday.
1 Yes, I did my homework last night.
He hasn't done his homework yet.
2 Yes, Mrs. Jones went to the butcher's this morning.
Mrs. Williams hasn't been to the butcher's yet.
3 Yes, I spoke to him yesterday.
She hasn't spoken to him yet.
4 Yes, George swam across the river an hour ago.
Sam hasn't swum across it yet.
5 Yes, I saw that film yesterday.
Sam and Penny haven't seen that film yet.
6 Yes, Tim took off his shoes a minute ago.
Frank hasn't taken off his shoes yet.