用法辨析：

(1)“Why not+動詞原形+…?”(干嘛不……?)是簡略句，完全形式是：Why don't you +動詞原形+…?如：Why not go and have a look?(干嘛不去看看?)/Why not try it once again?(為什么不再試試?)

(2) seem(好象)的用法：記住幾個結構：①sb./sth.+seem+(to be+)形容詞+…;②sb./sth.+seem+like +…;③sb/sth+seem+to(do);④It seems that+從句。如：He seemed(to be) very happy when he was called by the headmaster.(被校長叫到名字時他好象很開心)/It seems that nobody else could do such a foolish thing except Jim.(除了吉姆好象沒有什么人會做出如此愚蠢的事情來)

(3) be afraid(害怕)的用法：記住幾個結構：①be afraid of sth;be afraid of(doing);②be afraid to(do);③be afraid that+從句。如：She is a little afraid of snakes.(她有點怕蛇)/Don't be so afraid to stay at home alone at night.(別害怕晚上一個人在家)/I'm afraid that somebody will take his place because of his serious mistakes.(恐怕有人要取代他了，因為他犯了那么大的錯誤)

(4) be sorry(抱歉)的用法：記住幾個結構：①be sorry for(sth);②be sorry for(doing sth);③be sorry to(do);④be sorry that+從句。如：I am very sorry for keeping you waiting so long.(不好意思讓你久等了)I am sorry to trouble you.(對不起，麻煩你了)/I am sorry(that) he isn't here at the moment.(恐怕他現在不在)

(5) be sure(確信)的用法：記住幾個結構： ①be sure of(sth);②be sure to(do);③be sure that+從句。如：She told me many times that she was sure to come.(她給我講過多次她一定會來的)/Are you sure of your answer?Maybe it's wrong.(你對你的答案有把握嗎?也許是錯的。)/I am sure that Dad will help me with the job.(我確信爸爸會幫著我做這件事情的)

(6) make 與do的用法：一般情況下表示進行活動或者做工作用do，表示創造建構某事物用make. 如：I don't know what to do.(我不知道該干什么)/I'm not going to do any work.(我不準備做什么)/My father and I once made a boat.(我和我爸曾經做過一只船)

此外還要記住一些固定說法：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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