用法辨析：

（1）“Why not+動(dòng)詞原形+…？”（干嘛不……？）是簡略句，完全形式是：Why don't you +動(dòng)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(gè)結(jié)構(gòu)：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(shí)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(huì)做出如此愚蠢的事情來）

（3） be afraid（害怕）的用法：記住幾個(gè)結(jié)構(gòu)：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(diǎn)怕蛇）/Don't be so afraid to stay at home alone at night.（別害怕晚上一個(gè)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?yàn)樗�犯了那么大的錯(cuò)誤）

（4） be sorry（抱歉）的用法：記住幾個(gè)結(jié)構(gòu)：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(duì)不起，麻煩你了）/I am sorry（that） he isn't here at the moment.（恐怕他現(xiàn)在不在）

（5） be sure（確信）的用法：記住幾個(gè)結(jié)構(gòu)： 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(huì)來的）/Are you sure of your answer？Maybe it's wrong.（你對(duì)你的答案有把握嗎？也許是錯(cuò)的。）/I am sure that Dad will help me with the job.（我確信爸爸會(huì)幫著我做這件事情的）

（6） make 與do的用法：一般情況下表示進(jìn)行活動(dòng)或者做工作用do，表示創(chuàng)造建構(gòu)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(zhǔn)備做什么）/My father and I once made a boat.（我和我爸曾經(jīng)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，……