3.考查被动语态和情态动词的结合，如：6)。
6)I can't find the recorder in the room.It by somebody.(2003.11)
A.must have taken
B.may have taken
C.may have been taken
D.should have been taken
答案：C
4.考查被动语态和非谓语动词的结合，如：4)、5)和7)。
4)We shall ask for samples and then we can make our decision.(2003.11)
A.to be sent
B.being sent
C.to have been sent
D.to sent
答案：A
5)The question at the meeting tomorrow is very important.(2004.11)
A.to discuss
B.being discussed
C.to be discussed
D.will be discussed
答案：C
5.转化为系动词的感官动词+表语，这种结构中用动词的主动形式表达被动意义。这样的动词有feel, smell, sound, taste等，如8)。再如：
Good medicine tastes bitter.良药苦口。
This material feels very soft.这种材料摸起来很柔软。
再者：
不及物动词不可能有被动语态，但及物动词也未必有被动语态，主要是看句子侧重表达的概念，如：
This kind of glasses manufactured by experienced craftsmen ____ comfortably.
A.is worn
B.wears
C.wearing
D.are worn
答案：B
题中wear表示眼镜的特点，不可用被动语态。这样的动词有cut, read, sell, wash, wear, write等。例如：
This kind of software sells well.这种软件卖得很好。
The knife cuts well.这把刀很好切。
Nylon underwear washes well.尼龙内衣很容易洗。
责任编辑：mman
