的作用。

Don't you think the wife plays the most important part in a family? 难道你不认为妻子在家庭中起最重要的作用吗？

思维拓展：

play a role in sth 在...... 中起作用；在...... 中扮演角色

take part in 参加

take an active part in 积极参加 3. Although many American move a lot, they still recognize and understand each other's dialects.

　尽管许多美国人经常搬家，但是他们仍然能辨别和理解彼此的方言。

recognize vt.辨认出，承认， 公认

I recognized him as soon as he came in the room. 他一进屋我就认出了他。

We recognized that task was not straight for ward.我们意识到这项任务并非轻而易举。

We recognized him to be a great leader.我们承认他是一位伟大的领袖。

思维拓展：

recognize...by/ from ...通过...... 认出/ 辨别出

recognize ...as 把...... 当做；承认...... 为

recognize that ... 承认/意识到......

It is recognized that ..人们意识到...... 　潜心辨析：

know 意为"认识，熟悉，知道"，表示认识·熟悉某人或某事，是个持续性动词。

recognize 意为"辨认出"，指原来熟悉，经过一段时间后重新认出，是一个表示瞬间动作的动词。

Realize意为"意识到"，强调经过一个过程后的完全了解。 小试牛刀：

　请选择recognize, know, realize 的适当的形式填空。

○1I ______ him ten years ago, but he had change so much that I can hardly ______ him at present.

○2I have ________ him for five years.

○3None of us ________ the danger we were in.