内容正文:
Unit4 I used to be afraid of the dark
Section A
1. — Mario, you used to be short, didn’t you?马里奥,你以前个子矮,对吗?
— Yes, I did. 是的。
【解析1】 (1) use v.使用→useful adj. 有用的 use up 用完
Studying English is__________(use).
(2) use sth to do sth 用某物做某事
We use Internet __________(find) information.
(3) used to do sth 过去常常做某事,表示过去做过的事现在已经不做,只用于过去时态。
◆变成否定句或疑问句时要借助助动词didn’t/did
useful
to find
【拓展】(一) 肯定形式:主语+used to+do…
I used to get up at six.
(二) 否定形式:主语+ usedn’t /didn’t use +to do …
He usedn’t to study hard.= He didn’t use to study hard.
(三)疑问形式:
① Used +主语+ to do sth …?
答语: Yes, 主语+used to./ No, 主语+ usedn’t to
②Did + 主语+ use + to do ….?
答语: Yes, 主语+ did./ No, 主语+ didn’t
Used he to go to school on foot?
= Did he use to go to school on foot?
(四) 反意疑问句:
肯定句+ didn’t /usedn’t+ 主语?
He used to be very rich, didn’t he/ usedn’t he?
否定句+ did /used +主语?
He didn’t use to smoke, did /used he?
①My mother used_________(tell)us story when we were young.
( ) ②He used