某些系动词,如feel, look, seem, appear, taste, sound, smell, prove, remain等用主动形式表示被动意义;主语一般是事物,且表示该事物本身具备某一固有特点。。如:The material feels very soft. 这种料子摸起来非常柔软。误:The material is felt very soft.The music sounds beautiful. 这音乐听起来非常美妙。误:The music is sounded beautiful.表示主语由内在品质或性能,使得主语得以达成或不可以达成,用主动表示被动,容易见到的这种动词有:write, read, clean, sell, wash, cook, open, close, lock等。1. 同well, badly, easily等副词连用。如:The cloth washes easily. 这布非常不错洗。The book sells well. 那本书非常畅销。The pen writes smoothly. 这支笔非常不错写。2. 谓语动词用否定式。如:The window wont open. 这扇窗开不了。The door wont lock. 这门锁不上。3. 主语+谓语(blow, wear等) +主补。如:The door blew open. 门被风吹开了。某些平时用语,cook, bake, make, print, pack, build, work out等动词用于进行时态时,可用主动形式表示被动意义。如:The fish is cooking. 鱼正在煮。The book is printing. 那本书正在印刷中。The plan is working out. 计划正在制定。不定式在下列状况下用主动形式表示被动意义:1. 在be+形容词+fit to do句型中。如:English words are difficult to remember. 英语单词非常难记。注:常用于此句型形容词有easy, hard, difficult, heavy, light, comfortable等。2. 在作补语的形容词后作状语的不定式。如:We found the book easy to understand. 大家感觉这本书的容易懂。3. 在This /That /These /Those be后的名词后的不定式。如:This is a difficult problem to solve. 这是一个非常难解决的问题。4. 在there be/have/with sth. to do(有要) 结构中。如:I have a lot of work to do. 我有很多事要做。5. 在疑问代词+不定式结构。如:The question is what to do next. 问题是下面干什么。6. 在be to blame/seek/let结构中。如:The house is to let. 此房出租。He is to blame for this. 他因此事应遭到责备(www.hxen.com)。在表示需要的need, want, require,及be worth后的动词-ing形式,用主动形式表示被动含义。如:The floor needs sweeping. 这地需要打扫了。That picture is worth looking at. 那幅画值得看。