make mistake 犯错

　　8.keep to oneself 是固定搭配，意为"保守秘密"，"不与。。。来往"。

　　 Eg：I'll thank you for keeping your opinions to yourself. 请你别发表你的看法。（保留你自己的意见。）

　　 They are only a man live here and he keep to himself. 这里只有一个男人住在这里，他不跟别人交往。

　　9. have problem with....表示"在。。。方面有问题"，相当于have trouble/difficulty with sth..

　　 Eg: Some old people have some problems with the life in city. 一些老年人不适应城市生活。

　　 Jim has trouble diffculty with his Chinese. 吉姆在汉语学习中有些困难。

　　10.afraid adj 做形容词时，意为"害怕；畏惧；担心"

　　 固定句式：be afraid of sb/sth 害怕某人/某物

　　 be afraid of doing sth 害怕做某事

　　 be afraid to do sth 害怕做某事

Eg：Don't be afraid of dog. 不要怕狗。

I'm afraid of telling you the truth. 我害怕告诉你事实。

I'm afraid to tell you the truth. 我害怕告诉你事实。

*** I'm afraid that....从句常用于口语，表示委婉地"谢绝，"或者"拒绝"对方，相当于"I'm sorry, but..."

Eg: Would you like to come to my birthday party ? 你能来参加我的生日聚会吗?

---- I'm afraid I can't. Because my sister is ill I have to look after her. 恐怕我不能去，我妹妹病了，我要照顾她。

11. mistake n./v 错误；失误

(1). 做名词时，是可数名词。

make a mistake 犯错 make mistakes 犯错

Eg：Please check your parper to make sure there are no mistakes. 请检查你的试卷以确保没有错误。

The whole class did a good job, and none make a mistake. 全班都做得很好，没人犯错误。

（2）作动词，意为"弄错；误以为"，过去式mistook,过去分词：mistaken。

常用结构：mistake A for B 把A错当成B

by mistake 错误地（做副词）

Eg：Mr Lin always mistake salt for sugar. 林先生经常把盐当做糖。

Tina took Lily's bag by mistake. 缇娜错拿了莉莉的包。

He is always be mistaken for a girl by people. 他经常被人们当做女孩子。

Ⅱ情态动词should 的用法。

（1）定义：should 是请他动词，意为"应该、应当"，表示劝告，提出建议。可以用于各种人称，本身无人称或数的变化，也不能做谓语动词。只能后接动词原形，构成谓语。表示说话人的预期和情态。否定是shouldn't.

（2）同义词组：should == be supposed to

（3）结构是： should + V-原

　　　　Eg: You should wear your cool pants. 你应该穿上那条很酷的短裤。

What should we do next? 接下来我们应该做什么呢？

You shouldn't do the thing your mother doesn't like. 你不应该做那些你妈妈不喜欢的事。

练习：You have made some mistakes again. I think you_____ be more careful next time.

A can B may C should D would

-----How was the youth club last night, Mark?

-----It was great fun. You ____ come.

A would B mustn't C should D shouldn't

Ⅲ、if 引导的条件状语从句。