机械制造工艺的基础知识.ppt

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I. 代词可以分为以下七大类:
1
人称代词
主格
I, you, he, she, it, we, you, they
宾格
me, you, him, her, it, us, you, them
2
物主代词
形容词性
my, your, his, her, its, our, their
名词性
mine, yours, his, hers, its, ours, theirs
3
反身代词
myself, yourself, himself, herself, itself, ourselves, yourselves, themselves
4
指示代词
this, that, these, those, such, some
5
疑问代词
who, whom, whose, which, what, whoever, whichever, whatever
6
关系代词
that, which, who, whom, whose, as
7
不定代词
one/ some/ any, each/ every, none/ no, many/ much, few/ little/ a few/ a little,
other/ another, all/ both, neither/ either
II. 不定代词用法注意点:
1. one, some与any:
1) one可以泛指任何人,也可特指,还可指上文中出现的同类事物,要区别于it,复数为ones。some多用于肯定句,any多用于疑问句和否定句。One should learn to think of others. Do you have a ruler? No, I don’t have one.
Do you have any bookmarks? No, I don’t have have some questions to ask.
2) some可用于疑问句中,表示盼望得到肯定的答复,或者表示建议,请求等。
Would you like some bananas?   Could you give me some money?
3) some 和any可修饰名词,要注意单复数。修饰可数名词单数时,some表示某个,any表示任何一个。
I have read this article in some magazine.   Any student can solve this problem.
4) some和数词连用表示“大约”,any可与比较级连用表示程度。
There are some 3,000 students in this school.    Do you feel any better today?
2. each和every:
each强调个别,代表的数可以是两个或两个以上,而every强调整体,所指的数必须是三个或三个以上。
Each student has a pocket dictionary. / Each (of us) has a dictionary. / We each have a dictionary.
Every student has strong and weak points. / Every one of us has strong and weak points.
3. none和no:
no等于not any,作定语。none作主语或宾语,表示数量,一个都没有,代替不可数名词,谓语用单数,代替可数名词,谓语单复数皆可以。
There is no water in the bottle.
How much water is there in the bottle? None.
None of the students are (is) afraid of difficulties.
4. other和another:1) other泛指“另外的,别的”常与其他词连用,如:the other day, every other week, some other reason, no other way, the other特指两者中的另外一个,复数为the others。如:
He held a book in one hand and his notes in the other.
Two students in our class failed, but all the others passed the exam.
2) another指“又一个,另一个”无