What is the appearance of master and subordinate in English?

The present tense of subject and subordinate means that in time adverbial clauses and conditional adverbial clauses, if the main clause is in simple future tense, the subordinate clause uses simple present tense instead of simple future tense. Conjunctions such as if, until, before, after, and when can all be subject and present. Such as: I’ll?be?a?nurse?and?look?after?patients?when?I?grow?up. (The main clause is the future tense)

Don't?laugh?at?others?when?they?make?a?mistake. (The main clause is an imperative sentence)

You? should?be?quiet?when?you?are?in?the?reading?room. (The main clause is the simple present tense containing modal verbs)

The poster must adopt it^-^