Giúp mình với mọi người ạ

$1. $ discovered

$→$ ago $→$ Thì QKĐ

$2. $ haven't seen

$→$ for $→$ Thì HTHT

$3. $ haven't eaten

$→$ HTHT since QKĐ

$4. $ did you know

$5. $ was

$6. $ hasn't been

$7. $ came

$8. $ hasn't spoken

$9. $ have had

$10. $ did you arrive

$*$ Thì HTHT: 

$(+)$ S + have/has + Vpp

$(-)$ S + have/has + not + Vpp

$(?)$ Have/Has + S + Vpp?

$*$ Thì QKĐ: 

$(+)$ S + Ved/V2

$(-)$ S + didn't + V-bare

$(?)$ Did + S + V-bare?

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 QKĐ (V: to be)

(+) S + was/were + ... 

(-) S + was/were + not ... 

(?) Was/Were + S ... ? 

S số ít, I, he, she, it + was

S số nhiều, you, we ,they + were

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, ...

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

1. discovered 

DHNB:ago (QKD)

2. haven't seen

DHNB: for morer than a week (HTHT)

3. haven't eaten

HTHT + since + QKD

4. have you know 

DHNB: since (HTHT)

5. was

DHNB: ago (QKD)

6. hasn't been

DHNB: for years (HTHT)

7. came

DHNB: ago (QKD)

8. hasn't spoken 

DHNB: for over three weeks (HTHT)

9. have had

DHNB: for ... (HTHT)

10. did you arrive

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