指示限定词就是传统语法中的“形容词性指示代词”，包括this, that, these, those 和 such。
1. this/that可与单数可数名词和不可数名词搭配，如 this/that boy, this/that monkey；而 these/those 则只能与复数可数名词搭配，如 these/those boys 。
2. such 可与复数可数名词和不可数名词搭配。比如：
- such problems
- such freedom
such 后面跟不定冠词时可以和单数名词搭配。比如：
- such an idiot
such 还可与 some, any, no, every, each, all, another, few, several 以及基数词等限定词搭配。比如：
- These questions have such few syllables, but their depth is endless.
