与所指代的名词在数上一致;
与所指代的名词在性上一致;
与所指代的名词在格上一致;
反身代词
语法规则：动作的发出者(主语)与动作的承受者(宾语)一致时，则必须用反身代词，不一致则不可用反身代词。
e.g.when her violation of school rules(主语)forced her t0 quit school，she went to Beijing and opened a factory there.(错误)
反复代词
1.that指代不可数名词或抽象可数名词单数，经常出现在"that of..”结构中;
one指代泛指可数名词单数，即代具体可数名词单数，复数为ones;
2.与比较结构一同出现，例如：
These designs ale inferior to those proposed by the German company.这些设计图不如那家德国公司提供的设计图。
inferior tosuperior tosenior tojunior to prior to
posterior to prefer A to Bbe preferable differ frombe compared with
in comparison withbe different fromrather than