i saw a cat sleep on the roof just now改为被动语态答:注:这类短语动词常见的还有agree to, ask for, laugh at, listen to, look after, think of, talk about, call on等。常用的由“及物动词+副词”构成的短语动词有bring about, carry out, find out, give up, hand in, make out, pass on, point out, put away, put on, put off, ...