Tus kêu làm câu : 60 -> 65

60 : have never visited

HTHT + never + before : S + have / has + never + VPII + before

61 : has writen 

HTHT + since : S +have / has + VPII +since + 1 mốc TG / QKĐ

62 : has been

HTHT : S + have / has + VPII

DHNB : for several years

63 : has worked

HTHT + for :S + have / has + VPII + for +1  khoảng TG

64 : have just met

HTHT +just : S + have / has + just + VPII

65 :  has heared

This is the first time + S + have / has + VPII

`60.` have never visited

`->` never + VPII + before

`61.` has writen 

`->` since + N – mốc/điểm thời gian

`62.` has been

`->`  for + the past/ last + thời gian

`63.` has worked

`64.`  have just met

`65.` has heared

`->` Công thức thì HTHT (Hiện tại Hoàn thành)

`(+)` S + have/ has + PII

`-`  I/ We/ You/ They + have
`-` He/ She/ It + has

`(-)` S + haven’t/ hasn’t + PII.

`(?)` Have/Has + S + PII?

Dấu hiệu nhận biết:  just, recently, lately, already, before, ever, never, yet,...