`\color{#145277}{N}\color{#246483}{a}\color{#34768F} {e}\color{#44889B}{u}\color{#539AA7}{n}`

`***` Thì HTHT : 

`@` For `+` quãng thời gian : trong khoảng (for a month, for a long time)

`@` Since `+` mốc thời gian : từ khi (since `2006`, since `2008`)

`(+):` S + have/ has + VpII

`(-):` S + have/ has + not + VpII

`(?):` Have/ Has + S + V3 `?`

       WH-word + have/ has + S (not) + V3 `?`

`->` S = I/ We/ You/ They + have

`->` S = He/ She/ It + has 

`***` Thì HTHT tiếp diễn :

`(+):` S + have/ has + been + V_ing

`(-):` S + have/ has + been + not + V_ing

`(?):` Have/ Has + S + been + V_ing `?`

       WH-word + have/ has + S + been + V_ing`?`

`--------------`

`31. A`

`32. B`

`33. A`

`-` S1 + V(QKĐ) + as soon as + S2 + V(QKHT)

`34. D`

`35. D`

`36. C`

`-` Look for: tìm kiếm

`37. B`

`38. A`

`39. B`

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

`40. D`

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: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

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

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

31. A 

S + has/have + been  +Ving: thì HTHTTD

32. B

DHNB: in the last two decades (HTHT)

33. A

QKĐ + as soon as + QKD

QKHT: S + had + V3/ed 

34. D

35. D

since + mốc thời gian 

for + khoảng thời gian 

36. C 

DHNB: since yesterday (HTHTTD)

37. B

DHNB: since last Sunday (HTHT)

38. A 

DHNB: for a long time (HTHTTD)

39. B

This / it is the first time + S + has/have + V3/ed 

40. A

DHNB: yet (HTHT)

`color{orange}{~MiaMB~}`