用法辨析：

(1)“Why not+动词原形+…?”(干嘛不……?)是简略句，完全形式是：Why don't you +动词原形+…?如：Why not go and have a look?(干嘛不去看看?)/Why not try it once again?(为什么不再试试?)

(2) seem(好象)的用法：记住几个结构：①sb./sth.+seem+(to be+)形容词+…;②sb./sth.+seem+like +…;③sb/sth+seem+to(do);④It seems that+从句。如：He seemed(to be) very happy when he was called by the headmaster.(被校长叫到名字时他好象很开心)/It seems that nobody else could do such a foolish thing except Jim.(除了吉姆好象没有什么人会做出如此愚蠢的事情来)

(3) be afraid(害怕)的用法：记住几个结构：①be afraid of sth;be afraid of(doing);②be afraid to(do);③be afraid that+从句。如：She is a little afraid of snakes.(她有点怕蛇)/Don't be so afraid to stay at home alone at night.(别害怕晚上一个人在家)/I'm afraid that somebody will take his place because of his serious mistakes.(恐怕有人要取代他了，因为他犯了那么大的错误)

(4) be sorry(抱歉)的用法：记住几个结构：①be sorry for(sth);②be sorry for(doing sth);③be sorry to(do);④be sorry that+从句。如：I am very sorry for keeping you waiting so long.(不好意思让你久等了)I am sorry to trouble you.(对不起，麻烦你了)/I am sorry(that) he isn't here at the moment.(恐怕他现在不在)

(5) be sure(确信)的用法：记住几个结构： ①be sure of(sth);②be sure to(do);③be sure that+从句。如：She told me many times that she was sure to come.(她给我讲过多次她一定会来的)/Are you sure of your answer?Maybe it's wrong.(你对你的答案有把握吗?也许是错的。)/I am sure that Dad will help me with the job.(我确信爸爸会帮着我做这件事情的)

(6) make 与do的用法：一般情况下表示进行活动或者做工作用do，表示创造建构某事物用make. 如：I don't know what to do.(我不知道该干什么)/I'm not going to do any work.(我不准备做什么)/My father and I once made a boat.(我和我爸曾经做过一只船)

此外还要记住一些固定说法：do good/harm/business/one's best/a favour……

make a decision/an effort/a mistake/a noise/a phone call/money/war/the bed/sure，……

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