help me

`Đáp` `án:`

1. haven't eaten 

DHNB: today (HTHT)

2. visited

DHNB: last weekend (QKĐ)

3. has broken

4. have forgotten

5. has worked

DHNB: for 5 years (HTHT)

6. has been

DHNB: since Friday (HTHT)

7. Have you

DHNB: ever(HTHT)

8. have never lived

DHNB: never (HTHT)

9. haven't cleaned 

10. wrote

DHNB: last week (QKĐ) 

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Công thức thì HTHT

(+) S + has/have + V3/ed 

(-) S + has/have + not + V3/ed 

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

S số ít, he. she, it + has

S số nhiều, I, you, they, they + have

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

Công thức thì QKĐ (V: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

DHNB: ago, last (year, month ...), yesterday, in + năm QK, ...