(2)I think you've made a mistake-that's my book.

我想你弄错了，那本书是我的。

(3)However，social changes that are brought about by new technology are often mistaken for a change in attitudes.

然而，由新技术所带来的社会变化经常被误认为是态度的改变。

[归纳拓展]

(1)make mistakes/make a mistake犯错误

(2)mistake n.错误；vt.误解，弄错

by mistake错误地(并非故意地)

mistake A for B把A错认为B

(3)mistaken adj.错误的，弄错的

[即时跟踪]　完成句子

①It is easy to make__mistakes__in__learning__English.

学习英语时很容易出错误。

②Tom didn't make__a__single__spelling__mistake in his composition.

汤姆在这篇作文里一个字也没错。

③The police found the lost car________.

A.with mistake B.by accident

C.by mistake D.in accident

答案　B

解析　句意：警察偶然发现了那辆丢失的汽车。by accident偶然的，不经意间。符合句意。

2.look out for 当心/注意/留意某人/某物

[语境感悟]

(1)(教材P32)Look out for words such as but，however，or and I mean.

要注意一些词，诸如but，however，or和I mean。

(2)Look out for the coming bus!

当心开过来的公共汽车！

(3)She looked through her notes before the exam.