一、that和what (一)that的主要用法有: 1.在定语从句中主要作为关系代词,可充当主语、宾语或表语,代替指代人或物的先行词。2.在名词性从句中,连接词that不充当句子成分,也没有实际含义,引导主语从句、表语从句、同位语从句时,不能省略。提示:that通常作为强调句型的结构词,而这种句型通常与其他从句结合起来考查。 First, that and what (a) that the main usage are: 1. In the attributive clause mainly as a relational pronoun, can act as a subject, object or form, instead of referring to people or things. In nominal clause, the connective that does not act as a sentence component, there is no practical meaning, guide the subject clause, the adverbial clause, the appositive clause, can not be omitted. Hint: that is usually used as a structural word to emphasize sentence patterns, which are usually combined with other clauses.