初中英语知识点微课课件考点精讲 同课异构 53 one的用法

one的用法
—Mum, have you seen my mobile phone?
—_________you bought last week? I’m sorry I haven’t seen _________.
A．One; it B．The one; it
C．One; one D．The one; one
一、典例精析
【解析】句意：妈妈，你看到我的手机了吗？你上周买的那个吗？对不起， 我没有看到它。you bought last week做the one的定语从句，后文再提到那部手机用it来代替，故
选B。
【答案】B
one作代词用指代前文提到的名词。但it所指是同名同物，one和that所指是同名异物，如：
1.I like the bike, but I have no enough money to buy it.
2.I like bicycles, but I can’t afford to buy one.
3.The bike which I want to buy is more beautiful than that he has.
二、考点剖析
one与that可用来指代同名异物时区别如下：
1.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）
2.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）
3.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）
三、巩固提升
Your watch is quite nice, where did you buy _____? I want to buy _____ too.
A. one; one B. it; it C. it; one D. one; it
【解析】句意：你的表很好看，你在哪里买的？我也想买一块。it, 代词，指代your watch； one代词，承接前文代替a watch。据题，故选C。
【答案】C
one作代词用指代前文提到的名词。但it所指是同名同物，one和that所指是同名异物。
one与that可用来指代同名异物时的区别。
one的用法
四、思维导图