[即时演练4]　

　　(1)句型转换(每空一词)

　　①My sister gave me a big cake.

　　→I_was given a big cake by my sister.

　　②We should make good use of every chance.

　　→Every chance should be made good use of.

　　(2)The old man was quite weak after the operation, so he ________.

　　A．must be taken care B．must take care of

　　C．must be looked after D．must look after

　　解析：选C　句意：这位老人手术后很虚弱，所以必须被照顾。由句意可知此处表示被照顾，故C项正确。A项需改为"must be taken care of"。

　　四、使用被动语态应注意的几个问题

　　1．主动形式表示被动意义

　　(1)当feel, look, smell, taste, sound 等系动词后面接形容词/名词构成系表结构时；当cut, read, sell, wear, write, wash, cook, shut, dry, drink 等表示某种属性且带有修饰语时；当动词表示"开始、结束、运动"等意义时。

　　The fish smells good.

　　鱼闻起来很香。

　　The book written by that famous writer sells very well.

　　那位著名作家写的书很畅销。(实际上是被卖得畅销)

　　Cotton feels soft.

　　棉花摸起来很柔软。

　　These cups clean easily.

　　这些杯子很容易洗。

　　The museum doesn't open on Monday.

　　博物馆星期一不开放。

　　[名师点津]　下面的短语经常使用主动语态：come out, come into being, go off, run out, give out, give in。

　　(2)want, require, need 后面的动名词用主动形式表示被动意义，或用不定式的被动形式。

　　These flowers want/require/need watering/to be watered.

　　这些花需要浇水。

　　(3)"be＋adj.＋to do"中，不定式的逻辑宾语是句子的主语，用主动形式表示被动含义。

　　He isn't easy to get along with.

　　他不容易相处。

　 [即时演练5]