When to use do does and when to use copulars such as is are For example: 1. Why does Mrs. Li's cat stop catching mice? Do you use do or is? Have you cleared your luggage? How to say it? Why use have? It's better to talk about when and what to use? isn't －－－－catching－－？ Who can explain to me why

When to use do does and when to use copulars such as is are For example: 1. Why does Mrs. Li's cat stop catching mice? Do you use do or is? Have you cleared your luggage? How to say it? Why use have? It's better to talk about when and what to use? isn't －－－－catching－－？ Who can explain to me why

In the present tense, you must find the predicate part or the predicative part of the sentence. The so-called predicate is the action made by the subject; the predicative is the action that can explain the subject's characteristics