The sign word formula for the appearance of the master and subordinate

The words that mark the appearance of master and subordinate include when, whenever, after, before, as, etc. The present tense of subject and subordinate means that in time adverbial clauses, conditional adverbial clauses and concession adverbial clauses, if the main clause is in simple future tense, the subordinate clause uses simple present tense instead of simple future tense.

The sign word of "the master will appear"

(1) when (when...). when adv. At that time; when; (after the expression used for time) at that time; at that time, conj. if; at... time; since, pron. when; at that time.

(2) whenever (whenever). whenever adv. Exactly when; no matter when, conj. Whenever; no matter when; at any time; no matter when

(3) after (after...). after prep.…after; (indicating time) after…; (indicating position, order) after…, conj. after…, adv. after, after.

(4) before (before...). before prep. Before...; prior to, better than; in front of...; with..., conj. Before...; before...; earlier than...; with....

(5) as (when...; side... side). as adv. Likewise, in the same way; for example, prep. as, in the capacity of...; as, conj. Because of; like, like...; at the same time, when...; despite.

Usage of present tense of subject and subordinate

1. The main clause of the conditional adverbial clause is the future simple tense, so the clause is often used in the present simple tense

For example: When I grow up, I'll be a nurse and look after patients

I will be a nurse and look after patients when I grow up

2. If the main clause is an imperative sentence, then the subordinate clause usually Use the present simple tense

For example: Don't laugh at me when I make a mistake.

Don't laugh at me when I make a mistake.

3. If the main clause is in the present tense containing a modal verb, use the present tense in the subordinate clause as needed.

For example: You should be quiet when you are in the reading room

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Keep quiet in the reading room

4. If the conditional adverbial clause of if encounters the transformation of indirect and direct, the imperative sentence should be not to...

For example; She said not to close the window