课件30张PPT。Unit 2Grammar and usage 在前一个单元,我们回顾了非谓语动词在句子中充当主语、定语和宾语补足语时所表示的意义,以及他们在充当这些句子成分时的区别。这节课,我们接着学习非谓语动词的另一句法功能—作状语。非谓语动词过去分词: v-ed不定式: (to) dov-ing 形式动名词现在分词动词的形式 猜成份 1. Taking exercise can build up our body and keep a clear mind. ( )
2. They can get more detailed information from the original. ( )
3. Our government is aiming to build a “harmonious society”. ( )
4. Compared with the tuition fees of the South University, I can save 3000 yuan every year. ( )
5. To keep fit, we should have various healthy diets. ( )
6. They were very happy to see the bird flying away into the sky. ( )
7. After a brief discussion, we decided to put up a wall newspaper for our class. ( )
8. Not knowing what to do, he turned to Miss Wang. ( )动词不定式作状语不定式作状语时,要注意不定式的逻辑主语应与句子的主语保持一致。
(1)做目的状语
可单独出现,或以in order to+动词原形、so as to+动词原形等形式做目的状语,可置于句首,意为“为了……”,如:
To catch the bus, you must get up early.
= catch the bus…
= You must get up early catch…so as to In order to (2)做结果或程度状语
常以enough to 或too…to…等形式出现,并能转换成so…that…句式。如:
1.Liu Mei was lucky enough to receive many books from Project Hope.
= Liu Mei was lucky she received
many books from Project Hope.
2.He was too young to lift that box.
= He was young he cannot lift
that box.sothatsothat(3)做原因状语
常用在sorry, glad, surprised, pleased, angry等词后说明产生这种情绪的原因,或表示没有预料到的、事与愿违的结果,不定式要放在句子的后面,若不定式为不及物动词,其后应加必要的介词。如:
I’m sorry to hear about your failure
on business.
He will be so glad to see you here.
分词作状语1.分词或分词短语作状语时,可以表示时间、原因、让步、条件、方式或伴随状语。通常可以转换成相应的状语从句。表示方式或伴随状况时可以转换成并列或非限制性定语从句。如:
Put into use in April 2000 (=When it was put into use in April 2000), the hotline was meant for residents reporting water and heating supply breakdowns. (时间)
Blamed for the breakdown of the school computer network (=Because she was blamed for the breakdown of the school computer network), Alice was in low spirits. (原因)
Given time (=If he is given time), he’ll make a first-class tennis player. (条件)
We often provide our children with toys, thinking that all children like them. (=and think that …) (伴随)2.有时为了强调,分词前可带when, while, once, if, though, although, as if, unless等连词一起作状语,以便句子的意思更清楚、更连贯。如:
When comparing different cultures, we often pay attention only to the differences without noticing the many similarities.
Though tired, he still continued reading3.现在分词和过去分词作状语时区别:
不管是现在分词还是过去分词单独作状语,其逻辑主语必须与主句的主语一致。分词作状语通常可转换成一个相应的状语从句或并列句,如果状语分句或并列句中的谓语动词为被动结构,就用过去分词;如果状语分句或并列句中的谓语动词为主动结构,就用现在分词。例如When compared with the size of the whole earth, the biggest ocean does not seem big at all.
(分词部分相当于When the biggest ocean is compared with the size of the whole earth, 主语与分词是被动关系。)
When comparing it with the size of the whole earth, we find that the biggest ocean does not seem big at all.
(When we compare it with the size of the whole earth…主语与分词是主动关系。)4.现在分词的两种时态:一般式doing,通常指与主句的谓语动词所表示的动作同时发生或无先后顺序; 完成式having done则强调分词所表示的动作先于谓语动词所表示的动作。如:
While walking in the street, we met some friends of ours. (同时发生)
Having waited in the queue for half an hour, Tom suddenly realized that he had left his wallet at home. (“等待”在先)
5.分词完成式的两种语态:主动语态
having done;被动语态having been done。
Having been trapped in traffic, he was late for work.
6.分词的否定式的构成: not +分词。
Not having received a reply, he decided to write again.
Not repaired well, the washing machine stopped working again.
7.分词的独立主格结构是分词的一种特殊形式,在句中作状语。在分词的独立主格结构中,名词或代词同其后的分词在逻辑上有主谓关系时用现在分词;在逻辑上有动宾关系时用过去分词。在独立主格结构中,如果强调分词的时间发生在主句动词时间之前,常用现在分词完成时态表示。 如:
Winter coming, it’s getting colder and colder. (winter和come是逻辑主谓关系)
More money given, we should have sent more employees to the mother company to get trained. (句中money与give是动宾关系,所以用过去分词)
The snow having stopped, she went out to sweep the snow in the yard.
(强调分词动作发生在先)
注:在独立结构中,现在分词的完成式有时可以简化成过去分词。
His work having been finished/His work finished, he went home.
8. 一些习惯表达作插入语,起评注说明的作用,用法固定,不必考虑逻辑上的关系,常用的有:generally speaking, considering, given, supposing that, talking of, seeing that (鉴于)等。
eg. Considering everything, it wasn’t a
bad holiday.
Supposing that there was war, what
would you do?
Review the general fun_ction of non-finite
verbs (Tick√or×)√××××√√√√√√√√√√√√√√√√√Quiz I: Multiple choice.1. To be a great scientist, _____ .
A. maths is very important
B. maths is more important than
other subjects
C. one must understand maths
D. maths is important to be
understood
2. _____ some officials, Napoleon
inspected his army. A. Followed B. Followed by
C. Being followed
D. Having been followed3. There was a terrible noise ___ the
sudden burst of light. A. followed B. following
C. to be followed D. being followed
4. _______, liquids can be changed into
gases.A. Heating B. To be heated
C. Heated D. Heat
5. Don’t use words, expressions, or phrases _____ only to people with special knowledge.
A. being known
B. having been known
C. to be known D. known
6. ___ in thought, he almost ran into the
car in front.
A. Losing B. Having lost
C. Lost D. To lose
7. _____ such heavy pollution already, it
may now be too late to clear up the
river.
A. Having suffered B. Suffering
C. To suffer D. Suffered
8. The visitor expressed his satisfaction,
____ that he had enjoyed his stay here.
A. having added B. to add
C. adding D. added
9. The boy lay on the ground, his eyes
____ and his hands ____.
? A. being closed;trembling?????????
B. closed;trembling
? C. closed;trembled???????????????
D. closing;trembled
10. Unless ____ to speak, you should
remain silent at the meeting.
A. invited B. being invited
C. having invited D. being invited
11. Though ___ money, his parents
managed to send him to university.
A. lacked B. lacking of
C. lacking D. lacked in
12.The weather ____ so bad, we had to
put the game off.
? A. was????? B. is?? C. were????D. being
13.The country has already sent up 3
unmanned spacecrafts, the most
recent __ at the end of last March.
? A. has been launched??
B. having been launched??
C. being launched??
D. to be launched
Quiz II: 同义转换,每空一词。
1.The box is so heavy that I can’t carry it.
The box is ___ heavy ___ ___ ___ carry.
The box is not _____ ______ for me to
carry.
2.The maths problem is so difficult that
I can’t work it out.
The maths problem is ____ difficult
____ ____ ____ work out.
toofor me tolight enoughtoofor me to3. If I was given more time, I could do it
much better.
______ more time, I could do it much
better.
4. As a League member, he is always
helping others.
_____ ___ ________ ________, he is
always helping others.
GivenBeing a League memberQuiz III: Complete the sentences.If ______ (加热) to a high temperature, water will change into vapour.
__________________ (从太空望去), the earth is a water-covered globe.
________________________ (在她的话的鼓励下) the boy said sorry to his teacher.heatedSeen from the spaceEncouraged by her words4. He worked day and night
________________ (为了挣钱).
5. __________________ (告诉你实话吧),
I don’t like the way he talked.
6. _________________ (一般说来), girls
are more careful.
7. ____________________ (虽然雨下得
很大), it cleared up very soon.
8. He arrived late ___________________
(却发现火车开走了).to earn the moneyTo tell you the truthGenerally speakingThough raining heavilyto find the train goneThank you !