Was .... Did 唔識用

was/were係Past Continuous Structure:


The past continuous is usually used to refer to events happening at the same time that something important happened in the past.


過去連續通常被用於提到事件發生，同時事以前發生的重要.


Positive

Subject + conjugate the helping verb "be" + verb + -ing.

I was, You were, He was, She was, We were, You were, They were -> watching TV when I arrived.


Negative

Subject + conjugate the helping verb "be" + not + verb + -ing.

I wasn't, You weren't, He wasn't, She wasn't, We wasn't, You wasn't, They wasn't -> working when he came into the room.


Questions

Question word + conjugate the helping verb 'be' + subject + verb + -ing

What -> were you, they -> doing at seven o'clock?
What -> was I, he, she -> doing at seven o'clock?





did係Past Simple Structure:


Positive

Subject + Verb + ed OR Irregular Past Form + Objects

I, You, He, She, We, They -> played golf yesterday afternoon.
I, You, He, She, We, They -> went lunch at noon.

Negative

Subject + did not (didn't) + Verb + Objects

I, You, He, She, We, They -> didn't go on vacation last summer.

Subject + did not (doesn't) + Verb + Objects

Questions

(Why, What, etc.) + did + Subject + Verb + Objects?
Did -> I, you, we, they -> attend the meeting last week?

two verbs cannot be used in a sentence.(except in passive voice)
so we cannot say " was he feel good?"
was and feel are verbs.
so we can say " did he feel good?"