1. Past simple: (+) S+Ved+O

( -) S+didn't+V+O

(?) Did+S+V+O?

2. Present perfect:(+) S+have/has+Vpt2+O

(-) S+have/has+not+Vpt2+O

(?) Have/Has+S+Vpt2+O?

1) Past Simple

-Với động từ tobe

is

+ S+ am _______

are

isn't

- S+ am not _________

aren't

Is

? Am +S ______ ?

Are

is isn't

Yes, S+ am No, S+ am not

are aren't

You, we, they, N số nhiều+are

He, she, it, N số ít + is

I + am

Với động từ thường

+ He, she,it, N số ít + has

Vs/es

I, you, we, they, N số nhiều+ have

Vinf

- S+ doesn't + have ________

don't Vinf

? Does + S +have ________?

Do Vinf