动词的非谓语形式的用法
(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：
谓语动词(vt.)
+不定式
(作宾语)
[说 明]
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)
+ to (do)
(无)
help(帮助)
to可以省略
begin(开始)/ start(开始)/hate(憎恨)
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(知道) /ask(问) /find out(发现) /understand(明白) /wonder(疑惑) /learn(学会) /forget(忘记) /remember(记得) /teach sb.(教某人) /discuss(商讨)
what
where
+ how + to (do)
who
which
……
不定式疑问形式还可以作句子的主语、表语等。
不定式疑问形式还可以作句子的主语、表语等。
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)
汉 语 意 思
a key
to lock the door
锁门的钥匙
a box
to hold these things
装这些东西的箱子
give her a book
to read
给她一本书读
Is there any(+名词/代词)
to (do)?
有…要(做的)吗?
It’s time
to go.
是走的时间了。/ 该走了。
Do you have any work
to do?
你有工作要做吗?
I’d like something
to eat.
我要点儿吃的。
I have nothing
to say.
我没有话要说。
Would you like something
to drink?
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.(我停下来休息一会儿)(表示停下来的目的)
[B] 放在完整的谓语之后(即“谓语+宾语”、“谓语+宾语+补语”、“动词+表语”之后)。如：We cleaned the room to let him play in it.(我们打扫了房间以便让他在里面玩)/ I opened the window to see more clearly.(我打开窗子以便看得更清楚点儿)
[C] 有时表示目的的不定式短语可以放在句首。如：To arrive there on time,I got up one hour earlier than usual.(为了按时到达,我们比平时早起了一个小时)(表示早起的目的)
[注意] stop to do 与stop doing的不同。如：They stopped to have a look.(他们停下来看看)(不定式作“停下来”的目的状语)/ They stopped looking out of the window and began to listen to the teahcher.(他们停止向窗外望,开始听老师讲课)(动名词作宾语,表示“停止”的内容)
⑦ 动词不定式可以在句子中用作表语,限用于连系动词之后。如：My job is to keep the goal.(我的工作就是守住球门)
⑧ 动词不定式可以在句子中用作复合宾语中的宾语补足语。
谓 语 动 词(vt.)
+宾语 (人 / 物)
+不定式 (作宾语补足语)
ask(请)/tell(关照) / teach(教)/want(想要) / would like(想要)/get(让)/ help(帮)/ invite(邀请)/ like(喜欢)/ warn(警告) /
+sb. / sth.
+to (do)
make(使得) /let(让)/ hear(听)/ see(看)/ feel(感觉)/ watch(观看)/have(使得)/ help(帮助)
+sb. / sth.
+ (do)
如：Mum asked me to help her with the cooking.(妈妈叫我帮助她做饭)/ I would like you to see my parents.(我想要你见见我的父母)/ The boss often made the workers work 14 hours a day.(老板常让工人们一天工作14小时)/ Now let me hear you play the violin.(现在让我来听你拉小提琴)
[注意] help之后做宾补的不定式符号to可以省略；hear / see / feel / watch之后的宾补用不定式与现在分词时,含义不同,需特别注意,(参见现在分词部分)。试比较：
I heard her crying when I walked past.(我路过时听到她正在哭)(指当时瞬间的情况)
I sat near her and heard her sing the new song.(我坐在她附近听她唱新歌)(指整个过程)
(3)动名词
① 动名词由动词原形加词尾“ing”构成。动名词有动词的特征,可以跟宾语,可以被状语修饰；它也有名词的特征,在句子中可以作主语、宾语(包括介词宾语)等。动名词加相关词语(宾语或状语等)构成动名词短语。
② 动名词可以作主语。一般可用it作形式主语而将动名词短语后移。如：Learning English all by yourself is not so easy.(自学好英语不那么容易)(=It is not so easy learning English all by yourself.)
③ 动名词可以作宾语。
[A] want / need之后用动名词时,含有被动意思。如：Your car needs reparing badly.(你的车急需修理。)(被修)My hair needs cutting.(我要理发。)(头发被理)
[B] remember / forge / stop / finish之后用动名词时,与用不定式含义不同。如：I forgot to write a letter to him.(我忘了给他写封信)(根本没写) / I forgot writing a letter to him.(我忘了给他写过信)(写了却忘了) / They stopped to look back.(他们停下来向后看)(停下的目的是向后看) / They stopped looking back.(他们停止向后看)(不向后看了)
[C] enjoy / mind / keep / hate/ go等词一般用动名词作宾语。如：Do you mind my closing the door?(把门关上你介意吗？)/ She hates travelling by air.(她讨厌坐飞机旅行)/ They went swimming every afternoon.(他们每天下午去游泳)/ I enjoy walking around the town.(我喜欢在镇上转悠)
[D] like / love / start / begin / learn后面用动名词时,与用不定式意思相近或相同。如：We began to study English when we were at primary school.(我们在小学时就开始学英语了) / We began studying English when we were at primary school. (我们在小学时就开始学英语了)
④ 动名词可以作表语,此时特别注意不要与现在进行时混淆。如：My job is putting these parts together.(我的事情是把这些部件拼起来) / I am putting these parts together.(我正在把这些部件拼起来)
⑤ 动名词与现在分词构成相同,但是含义不同,动名词主要表示事情,而现在分词则主要表示进行着的动作。如：Eating too much is not good for your health. (动名词短语,作主语) / Seeing is believing.(动名词短语,分别作主语和表语) / He ran after a moving bus and got onto it.(现在分词,作定语) / His father saw him sitting on some eggs.(现在分词,作宾补)
(4)分词： 包含现在分词和过去分词。(高中学习重点)
① 主要区别：现在分词一般有主动的意思或表示动作正在进行的意思；过去分词有被动或动 作已经完成的意思。分词可以有自己的宾语或状语。
② 分词或分词短语在句子中作定语、状语和复合宾语等。
[A] 作定语：分词作定语时,一般要放在修饰的名词之前,分词短语作定语时,则要放在所修饰的名词之后。 如：I have got a running nose.(我流鼻涕) / The woman running after the thief shouted very loudly,“Stop the thief!”(跟着小偷追的妇女大喊：捉小偷！) / Yesterday I met a man called Mr. Black.(昨天我遇见了一个名叫布莱克先生的人)/ He only gave me a broken glass,so I was very angry with him.(他只给了我一个坏玻璃杯,所以我很生他的气)
[B] 现在分词可以作下列动词的宾语补足语。(参考不定式作宾语补足语)
谓语动词(vt.)
宾语
宾语补足语
keep(保持) /see(看到) /
hear(听到) /watch(注意到) /feel(感觉到)
sb./sth.
(do)ing
如：Mum kept me working all the week.(妈妈让我一个星期都在工作)/ When I entered the room,I saw Jack eating a big pear.(我进入房间时看到杰克正在吃一只大梨子)/ In the dark I felt something very cold moving on my foot.(黑暗之中我感到有个冷的东西在我的脚上移动)
[C] 现在分词可以作状语,表示伴随情况。如：She came into the classroom,holding a pile of papers in her hand.(他走进教室,手上抓着一沓纸)/ I am very busy these days getting ready for the coming oral test.(这些日子我正忙着准备即将来到的口语考试)
[D] 过去分词可以作表语,放在连系动词后面,但要注意不要与被动语态混淆,“主系表”主要表示状态,而被动语态则表示动作。常用过去分词作表语的结构有：be worried (焦虑) / be pleased (高兴) / be tired (疲劳) / get dressed (打扮好) / get lost (迷路) / get caught (遭遇) / beome frustrated (沮丧) / become intereted in (对…感兴趣)等等。例略。
[E] 过去分词可以作宾语补足语。如：I had my hair cut this morning.(今天早上我让人给我理了发)(注意：have sth. done表示动作由别人来做,而have done sth.则为现在完成时的结构,两个结构不可以混淆)
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