I. Cho dạng đúng của các từ trong ngoặc để hoàn thành các câu sau. 6. Listen! I think someone (knock) __________ at the door. 7. We (not see) __________ her for a long time. 8. They want (invite) _____ to the party. 9. My family (live) __________ in Thanh Hoa City for ten years. 10.I (have) __________enough money , I would buy a new car.

Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

DHNB: now, right now, (!), at present, at the moment,.....

Công thức thì HTHT

(+) S + has/have + V3/ed 

(-) S + has/have + not + V3/ed 

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

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

Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

-----------------------------------------------------------------

6. is knocking

DHNB: Listen! (HTTD)

7. haven’t seen

DHNB: for a long time (HTHT)

8. to invite

want +to V / N : muốn 

9. has lived

DHNB: for ten years (HTHT)

10. had (đề thiếu if)

If loại 2: If + QKĐ , S + would / could + V1 

`color{orange}{~STMIN~}`