Giúp em với Em cảm ơn ạ

Công thức thì HTHT

(+) S + has/have + V3/ed 

(-) S + has/have + not + V3/ed 

(?) Has/Have + S+ V3/ed?

Wh + has/have + S+  V3/ed?

S số ít, he, she, it + has

S số nhiều, you, I, we, they + have

DHNB: before, since + mốc thời gian, for + khoảng thời gian, yet, already, just,...

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S + has/have + not + V3/ed + before 

--> It/ This is the first time + S+  has/have + V3/ed 

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S + has/have + not + V3/ed + since / for + time 

--> The last time + S+  V2/ed + was + time 

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1. Katy has owned her car for four years.

2. We haven't gone to Las Vegas before.

3. Jimmy hasn't seen his uncle since 2002.

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