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2024年3月13日发(作者：js三目运算符范例代码)
it/one/that的用法和区别
I
. it／one ／that三者均可用作代词, 指代前面提到的名词。一般说来,
it指代同名同物; one与that则指代同名异物。
I have lost my umbrella; I'm looking for it. （该句中it就是指前面
的my umbrella）
I have lost my umbrella; I think I must buy one. （one在该句中表
泛指, 因为my umbrella已经丢了）
The umbrella you bought is cheaper than that I bought. （替代词that
在该句中特指“the umbrella I bought”, 以区别“the umbrella you
bought”）
II
. one与that虽可用来指代同名异物, 但one为泛指, 相当于a／an＋名
词; that为特指, 相当于the ＋名词。所以one所指代的名词的修饰语一般为 a
／an ／some ／any; that所指代的名词的修饰语往往是the ／this ／that。
A chair made of steel is stronger than one made of wood. （该句中
one可以换成a chair）
The water in the cup is hotter than that in the pot. （该句中that
可以换成 the water）
III
. one只能代替可数名词单数, 代替可数名词复数时用ones; that既可
以代替不可数名词也可以代替可数名词单数, 代替可数名词复数时用 those。
I like this pen more than that one. （one代替可数名词单数pen）
There were a few young people and some older ones in the house. （ones
代替可数名词复数people）
Mary's handwriting is far better than that of Peter. （that代替不
可数名词 handwriting）
These pictures are more beautiful than those. （those代替可数名词
复数 pictures）
IV
. one既可代替事物, 也可代替人, that只能代替事物而不能代替人。有
时可以用the one或the ones代替that或those。
The one ／That on the table is mine. （该句中The one代替事物, 并
且也可以用That）
He is the teacher, the one who is loved by the students. （该句中
the one代替人, 不能用that）
He advised the farmers to choose the best seed-heads, the ones ／
those that had the best color. （该句中the ones代替事物, 并且也可以用
those）
V
. one一般有前置修饰语, 有时也可有后置修饰语或不用修饰语。而 that
不能有前置修饰语, 但可有后置修饰语。
Cook was a strict but good captain, one who took good care of his
sailors.
The water in the well is cleaner than that in the river.
VI
. it可以替代句中的不定式或从句等, 充当形式主语或形式宾语。one
与that均无此用法。
It is known to everybody that the moon travels around the earth once
every month.
I found it hard to get on with her.
VII
. it与that均可以替代上文全句的内容或部分内容, 而one ／ones则
不可以。
He has saved my life; I'll never forget it. （it代替第一分句）
Tom is painting his house. I am told he does it every four years. （it
代替前面分句的部分内容painting his house）
Let's say we meet here at three o'clock. That ought to give you time
to buy everything. （That代替前面表述的内容）
［相关练习］
1. Mr Zhang gave the textbooks to all the pupils except _____ who had
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