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2017届高考英语考前冲刺经典词汇that、it、While用法详解 1. that that用作代词 1. that 用作指示代词（复数形式是those），其指代意义同形容词用法，同时它还可以用作定语从句中的先行词；还可为了避免重复，代替前述名词。 [解题指导]1.that用于代替前面提到的名词，以避免重复。以代替带定冠词（the）或限定词的可数名词单数或不可数名词，表特指，其后常有修饰语，常用于比较句型。 [典型例句] The weather in Harbin is colder than that in Dalian in winter.（that代替不可数名词weather) That is what he told me. What is that (which) you have got in your hand? The price of rice is higher than that of flour. [考题回顾] I'm moving to the countryside because the air there is much fresher than _______ in the city． A ．ones B．one C ．that D．there C。that代替不可数名词the air，用于比较句型，in the city为后置定语。 2. that 用作关系代词，引导限制性定语从句。先行词可人可物，用法相当于who或which。（但是在下列情况下多用that：先行词既有人又有物时；先行词有形容词最高级、序数词、不定代词、very，only等修饰时；先行词是不定代词时） | 
