语态的形式。

(2)英语中被动语态由“助动词be +动词的过去分词”构成。助动词be有时态、人称和数的变化。被动语态后的by短语有时可省去。具体结构见下表： 现在时态 一般现在时 现在进行时 am 谓语动词构 成 am 一 般 将 来 时 will + be+p.p. 现在完成时 have(has) +been+p.p. is +p.p. is +being+p.p. am are are is +going to+ be + p.p. are 过去时态 一般过去时 过 去 进 行 时 was +p.p. was 谓语动词were 构 成 +being+p.p. were [注] p.p.表示过去分词。

(1) 被动语态的用法：

过 去 将 来 时 would +be+p.p. was +going 过去完成时 had +been+p.p. to+be+p.p. were ① 不知道谁是动作的执行者(即不知道谁做)时用被动语态,省略by短语。如：A man was killed in the accident.(一个人死于事故)/ This window was broken yesterday.(这扇窗子是昨天被打破的)

②不说或者众所周知是谁做时,用被动语态,省略by短语。如：Rice is also grown in this place.(这个地方也种水稻)/ A railroad will be built here in three years.(三年之后这里将要修建一条铁路)

③强调动作的承受者,句尾加by短语。如：It was written by Lu Xun.(它(书)是鲁迅写的)/ A pet dog is never killed by its owner.(宠物狗是不会被主人宰杀的) (2) 主动语态如何改写为被动语态：

主动句： 主语(人/物) + 谓语(及物动词) + 宾语(人/物) + 其他 + 状语 (动作的执行者) (各种时态形式) (动作的承受者)

被动句： 主语(人/物) + 谓语(及物动词) + by +人 / 物 + 其他 + 状语 (动作的承受者) (be +过去分词) (动作的执行者)

(3) 注意点：

①“动词+间接宾语+直接宾语”改为被动时,可以用间接宾语做被动句的主语。如： His teacher gave him a dictionary.→He was given a dictionary by his teacher.(老师给

他一本字典→他得到老师一本字典)

也可以用直接宾语做被动句的主语,但是需用to或者for引出原句的间接宾语。如：His teacher gave him a dictionary.→A dictionary was given to him by his teacher.(老．．师给他一本字典→一本字典由老师送给了他)/His father made him a kite.→A kite was made ．for him by his father.(他的父亲给他做了一个风筝→一个风筝由他的父．．亲做给了他)

②“动词+宾语+动词原形”改为被动时,动词原形前要加to.如：The boss made the poor man work 12 hours a day.→The poor man was made to work 12 hours a day.(老板让．．这个可怜的人一天工作12小时→这个可怜人被迫一天工作12小时)

③“动词+…+介词”改为被动时,介词一般在原位不动。如：The girl takes good care of her little brother.→The girl‘s little brother is taken good care of by her.(女孩照顾小．．．．弟弟→女孩的小弟弟由她照顾着)

④“be+过去分词”未必表示被动语态,而可能是系表结构。如： He is pleased / worried / tired /…….(系表)(他高兴/焦虑/疲劳……)

He was hit / knocked down / told / shot / …….(被动)(他被击中/撞倒/关照/射中……)

7、动词的非谓语形式：动词不做谓语时的固定形式。

(1)动词的非谓语形式包括动词不定式、动名词和分词三种形式；其中分词又包含现在分

词和过去分词两种形式。它们在句子中不能单独作谓语。 (2)动词不定式：

① 形式：动词不定式基本形式由“不定式记号to+动词原形”构成。它的否定形式只

要在“to” 前面加上“not”。它的疑问形式是：“wh-疑问词+to+动词原形”。*它的被动形式：“to be +过去分词”。*它的完成形式：“to have +过去分词”。 ② 动词不定式具有名词、形容词和副词的特征,即可以在句子中作主语、宾语、定语、

状语、表语和宾语补足语。但不定式也保留动词的某些特征,即不定式后面可以跟宾语、表语和状语。动词不定式加上相关成分就构成不定式短语。

③ 动词不定式可以放在谓语前句子作主语。但是通常将作主语的动词不定式或不定式

短语放在谓语后面,而在主语位置用“it”作形式主语(有时在不定式的前面还会用for sb.表示不定式的逻辑主语)。如：To help animals is helping people.(帮助动物就是帮助人)/ It is very difficult (for us) to learn Chinese well.((对于我们而言)学好汉语是非常的困难)/ It took me half an hour to work out this problem.(解出这道题花了我一个小时的时间)

④ 动词不定式可以作谓语动词(及物动词)的宾语。

[A] 及物动词+不定式一般形式： +不定式 谓语动词(vt.) (作宾语) want(想) / try(试图) / decide(决定) / would like(想要) / hope(希望) / love(喜爱) / learn(学会) / afford(提供) / agree(同意) / fail(失败、未能) / mean(意味着) / prefer(宁愿) / wish(希望) help(帮助) begin(开始)/ start(开始)/hate(憎恨) + to (do) (无) [说 明] to可以省略 也可跟动名词,意义变化不大 forget(忘记) / remember(记得)/ like(总爱) 也可跟动名词,意义变化较大 如：I would like to have a rest at the moment.(我现在想休息一下)/ They began to search the room for the thief.(他们开始在屋子里搜寻小偷)/ He liked to have a swim in the pool near his house.(他喜爱在靠家的水塘里面游泳)/ When did you learn to speak English?(你什么时候开始学英语的？)/ Don‘t forget to close the door when you leave.(你离开时别忘了关门

[比较] He forgot to turn off the light.(他忘了关灯.) (没关)/ He forgot turning off the light.(他忘记关过灯.)(关了) / Please remember to ring me up.(记得给我打电话.)(还没打电话) / I remember calling you yesterday but you forgot.(我记得昨天给你打电话了,但是你忘记了.)(打过电话)

[B] 及物动词+疑问词+不定式： 谓语动词(vt.) +wh-疑问词+不定式 (作宾语) [说明]

tell (告诉) / show (显示) / know (知what 不定式疑问形式还可以作句子的主语、表语等。 道) / ask (问) / find out (发现) / where understand (明白) / wonder(疑惑) / + how + to (do) learn(学会) / forget(忘记) / remember(记得) / teach sb.(教某人) / discuss(商讨) who which …… 如：He does not know which one to take.(他不知道该选哪个)/ Tell me how to get to the station.(告诉我怎么样去火车站)/ She asked me what to do for today‘s homework.(她问我今天家庭作业做什么)/ Can you teach me how to search the internet?(你能教我怎样上网吗？)

[C] 不定式作宾语而后面又有宾语补足语时,通常用it代替作形式宾语,而不定式则

后置。如： I found it not very easy to learn to ride a bike.(我发现学骑车不很容易)

⑤ 动词不定式可以在句子中用作定语,放在名词或代词后面。

[A] 记住下面的一些结构： 被修饰部分 + 不定式(作后置定语) a key a box give her a book Is there any (+名词/代词) It‘s time to lock the door to hold these things to read to (do)? to go. 汉 语 意 思 锁门的钥匙 装这些东西的箱子 给她一本书读 有…要(做的)吗? 是走的时间了。/ 该走了。 Do you have any work I‘d like something I have nothing Would you like something to do? to eat. to say. to drink? 你有工作要做吗? 我要点儿吃的。 我没有话要说。 你要点儿喝的吗？ [B] 在这种情况下,如果不定式动词是不及物动词,则后面必须加介词。如： They could not find a place to live in.(他们找不到住的地方)/ Please give me a chair to sit on.(请给我一张椅子坐坐)/ He has got a writing brush to write with.((他找到了写字的毛笔)

⑥ 动词不定式可以在句子中用作状语,有下列几种情况：

[A] 放在不及物动词(come, go, stop, finish, wait等词)的后面。如：He came to see her yesterday.(他昨天来看望她)(表示来的目的)/ I stopped to have a rest.(我停下来