1-Formula
a. Affirmative:
I, you, we, they + have + PP
He, she, it + has +PP
Note: PP = past participle (quỏ khứ phõn từ) ( =V-ed: V cú quy tắc, =V3: V bất quy tắc)
b. Negative:
I, you, we, the + have not (haven’t) + PP
He, she, it + has not ( hasn’t) + PP
c. Interrogative:
Have + I, you, we, they + P.P .... ?
Has + he, she, it + P.P .... ?
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