1. 用some還是用any
1) 一般說來,some用于肯定;any用于否定,例如:
There are some letters for you. There aren't any letters for me.
2) 疑問句中,一般用any,如問話人心中已經(jīng)有“數(shù)”,或認(rèn)為對(duì)方會(huì)做出肯定回答時(shí),用some。試比較:
Have you any apples? (I can't see any.)
Could I have some of those apples? (which I can see.)
3) 注意其它方式的否定因素也可決定應(yīng)該用any,如:
I don't think there are any letters.(主句動(dòng)詞否定轉(zhuǎn)移,從句中用any。)
The boy solved the problem without any difficulty. (介詞without含否定意味。)
4) any在表示“任何(人或物)”時(shí),可用于肯定句中:
Oh! Any book will do;I just want something to read on the train.
5) 當(dāng)說話人心中有“數(shù)”(盡管可能不是具體數(shù)字)時(shí),否定句中也用some,如:
Some boys haven't done their homework.(肯定有人沒做,盡管不一定知道是多少人。)
6) any可用條件從句中,表示情況不明或未定,如:
Let me know if you need any help.(不知道對(duì)方是否需要幫助。)
試比較: Let me know if you need some help.(知道能如何提供幫助。)
2. all和both
1) all和both后面的of可有可無。
All / Both (of) the desks are new.
注:Both the desks... = Both of the desks... = Both desks...(the或of the可有可無)
2) 注意下列兩種句子里all/both的位置:
They all / both agree with me. I agree with them all / both.
句中all或both直接跟在代詞(主格或賓格)之后作同位語;其它不定代詞不能這樣用。
3) all/both同頻度副詞一樣,可位于句中(主、謂語之間或謂語動(dòng)詞結(jié)構(gòu)之中),如:
They all / both came. They were all / both waiting.
(注;each也能這樣用,其它不定代詞都不能。)
3. either與neither
either指“兩者之中任何一個(gè)”,neither指“兩者都不”通常與單數(shù)動(dòng)詞連用。但在非正式英語中也可與復(fù)數(shù)動(dòng)詞連用。例如:
You've got two answers. Either is correct. Neither is wrong.
There are trees on either/each side of the street.
Neither of the books is worth reading.(=Neither of the books are worth reading)
4. nobody, no one, nothing和none
nobody和no one指人,作單數(shù),后面不能接of 短語,例如:
Nobody/No one knows why she was late again.
Nobody was hurt in the match,were they?(反意疑問句中,可用復(fù)數(shù)代詞they來代替。)
nothing指物,作單數(shù);none指人或物,作單救或復(fù)數(shù)均可。none既可用于可數(shù)名詞,也可用于不可數(shù)名詞, 例如:
None of the money on the table is mine.
None of his reasons was/were true.
There's nothing on the table but a blue cap.
Of all my classmates, none likes dancing.
5. every與each
every強(qiáng)調(diào)的是“全體”;each則強(qiáng)調(diào)的是具體“每一個(gè)”。例如:
On every/each side of the square there were soldiers.
(The square has more than two sides。every side = each side =all sides表示“每邊、各邊”。) 試比較:
On either/each side of the road there were soldiers.
(The road has only two sides. either side= each side = both sides,表示二者之中“每一邊”。)
此外,each可作名詞性代詞,如:
Each has two books.(each作主語)
We each are satisfied with our own rooms.
(each作同位語,常位于主語和謂語動(dòng)詞之間,謂語動(dòng)詞及代詞等應(yīng)與主語一致。)
We are satisfied with our own rooms each. (each作同位語時(shí),也可置于句末。)
6. other, the other和another
1) other表示“另外的(人或物)”,“其他的(人或物)”,其復(fù)數(shù)形式為others。例如:
There are other ways of doing this exercise.
Lei Feng was always ready to he1p others.
2) the other表示兩者之中的“另一個(gè)(人或物)”,其復(fù)數(shù)形式為the others,例如:
He has a pen in one hand and a book in the other.。
Only three of the students were in the classroom;the others were all on the playground.
當(dāng)other泛指“別人”時(shí),前面不加定冠詞:
We must always be ready to help others.
3) another表示不定數(shù)目中的“另一個(gè)或類似的下個(gè)(人或物)”,還可與數(shù)詞連用,表示“再,又”的意思。例如:
How about another cup of tea?
The strike may last another two weeks.
7. one
1) one只可用于指代可數(shù)名詞,其復(fù)數(shù)形式是ones。例如:
If you can't find your pen,use the one on the table.
What nice shirts!which one/ones shall we buy?
2) one/ones通常不能直接用在their,my,his等物主代詞以及a(n),own,several和名詞所有格后面。例如:
His knife seems sharper than mine.(不能用 my one代替mine)
They don't like this town;they want very much to go back to their own.(不能用 * their own one代替their own 或 their own country)
但是,當(dāng)one/ones前面還帶有形容詞時(shí),則例外。如:
Have you any knives?I need a sharp one.
My old dictionary isn't as good as John's new one.
3) the/this/that one與that:
that可以指代不可數(shù)名詞,而one不能。如:
The weather in Wuhan is much warmer than that in Tianjing. (that不能用the one取代) that后面常接of短語,例如:
This dictionary is more expensive than that one.(that one=that dictionary. one一般不省略)
The window of your room is much bigger than that of mine.(that=the window,它后面有of短語,一般不用the one替代)
有時(shí)候the one和that可以互相取代,如:
The gold ring is in that box --- the one(=that)with the key in the lock.
4) one可以泛指人,相當(dāng)于you,we,people,其所有格為one's。例如:
One should do one's/his duty.
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