5 . 谓语部分为一个不可分割的动词短语。如：
Then he made faces and jumped like a monkey . 接着他做鬼脸并象猴子一样地跳。
二、常用主动语态表示被动意义的动词
英语中有一些动词，常和表示行为方式的状语连用，可以用主动语态表示在逻辑上似乎应该用被动语态表示的概念。如：
This pen writes we 《高一英语第八单元Food Around The World (世界上的食物)(第3页)》出自：www.89xue.com网
www.89xue.com ll . 这笔很好写。
pen (笔) 怎么能自己 write (写)呢 ? 这有点不合逻辑。从语法和逻辑角度看，This pen is written well . 似乎更正确。可英美人很少这样说。他们一般都说 This pen writes well . 他们认为这样更简略、更自然、更合乎习惯。
1 . 这类动词常见的有 open , look , read , write , smell , taste , sound , cook , wash , fill 等。如：The door opens to the south . 这道门是朝南开的。
This kind of cloth washes very well . 这种布很耐洗。
This book sells well . 这书很好销。
2 . 这类动词短语常见的有：take place(=happen) , break out , belong to 等。如：
Great changes have taken place in our country . 我国已发生了巨大的变化。
A fire broke out last night . 昨晚发生了一场火灾。
The books on the desk belong to our teacher . 桌上的书是属于我们老师的。
三、by 短语在被动语态中的省略问题
在被动句中有时用 by 词组，有时不用，这是由多种因素决定的。一般说来，当动作执行者不太清楚，不重要或难以说出时，通常不用 by 词组。但有时为了强调动作执行者或由于上下文和结构上所需则使用 by 词组。
1 . 下列情况下，by 短语不能省略。
①主动语态的主语是句子中的强调成分。如：
Even a child can answer this question . →This question can be answered even by a child .
②省去 by 短语，句子意思不完整或者含糊不清。如：
Miss Gao teaches us English . →We are taught English by Miss Gao .
③主动语态以疑问代词作主语的句子。如：
Who discovered America ? →Who(Whom) was America discover ?
④用英文表达汉语的“被，由，为……所……”等意思。如：
Telephone was invented by Bell .
The boy was beaten by his father .
2 . 下列情况下，by 短语可以省略
①主动语态是“主+谓+宾+状”结构。如：
They completed the building in 1996 . →
The building was completed in 1996 .
②主动语态含有双宾语。如：
He gave me some advice . →
I was given some advice .
Some advice was given (to) me .
③主动语态中含有复合宾语。如：I saw him go downstairs . → He was seen to go downstairs .
④主动语态中含有宾语从句。如：I believe that he will keep his word . → He is believed to keep his word . (=It is believed that he will keep his word . )
●被动含义 主动意义
英语中，我们多用 be +v . -ed 结构来表示被动含义；但有时也可用动词的主动形式来表示被动意义。有主动形式表被动意义是一种特殊的语态现象，常见的有：
一、在动词 need , want , require , bear , deserve 等后常用动名词的主动形式表被意义。例如：
① The civil quality of the whole nation needs improving . 全民族的文化素质需要提高。
② Every truth requires testing through practice . 一切真理都需要经受实践的检验。
③ The river dam wants reinforcing . 这道河堤需要加固。
④ His words won\'t bear repeating . 他的话不堪重述。
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