(1)one常用于比较结构,只代替可数名词,可代替人或物,其前可带冠词与修饰语。它所指的名词与前面提到的名词为同一类,但不是同一物。one指同类中的任何一个,为泛指,相当于“a +名词”,如:A wall made of bricks is much firmer than one of mud.(砖砌成的墙比泥砌成的墙要结实。)(one代替可数名词wall)表示特指时要用the one,如:The population problem may be the greatest one in the world today. (one代替可数名词problem) 代替复数名词时,则用ones,如:He prefers the red pens to the blue ones.(ones代替pens)
(2)that常用于比较结构,代替可数名词或不可数名词,只能代替物,只有后置定语而没有前置定语。that为特指,相当于“the+名词”,代替前面提到的同一名称的事物但非同一物,如:Your answer to the question is better than that of hers. (代替可数名词the answer) The weather of this week is worse than that of last week. (代替不可数名词the weather) that的复数形式为those,those=the ones=the+名词复数,如:In my opinion, the finest wines are those from France.(我认为,最好的酒来自法国。)
(3)it不用于比较结构,它所指的就是前面提到的同一物,如:The performance was wonderful; I like it very much.(it指前面提到的the performance)
(2)that常用于比较结构,代替可数名词或不可数名词,只能代替物,只有后置定语而没有前置定语。that为特指,相当于“the+名词”,代替前面提到的同一名称的事物但非同一物,如:Your answer to the question is better than that of hers. (代替可数名词the answer) The weather of this week is worse than that of last week. (代替不可数名词the weather) that的复数形式为those,those=the ones=the+名词复数,如:In my opinion, the finest wines are those from France.(我认为,最好的酒来自法国。)
(3)it不用于比较结构,它所指的就是前面提到的同一物,如:The performance was wonderful; I like it very much.(it指前面提到的the performance)