`1`.It is two years since she last wrote to her parents

`->` It + is / has been + time + since + S + last + Ved / V2

`=>` Đã bao lâu kể từ khi lần cuối làm gì

`2`.They have learnt English for `5` years

`->` Thì HTHT : S + have / has + VpII

`=>` I , You , We , They `+` have

`->` For + Time : Bao lâu

`3`.The last time I met her was in `2015`

`->` The last time + S + Ved / V2 + was + time / timeline

`=>` Lần cuối làm gì

`4`.My father has never visited Ha Long before

`->` S + have / has + never + VpII + before 

`=>` Chưa từng làm gì trước đây

`5`.We haven't eaten this food for ten years

`->` S + haven't / hasn't + VpII + for time / since timeline 

`=>` Chưa làm gì

`\text{# TF}`

Đáp án:

$1.$ It is two years since she last wrote to her parents.

`=>` S + have / has + not + V3 / PII + for / since + time / timeline

`=` It + be + time + since + mệnh đề QKĐ - S + V2 / V-ed

$2.$ They have learnt English for 5 years.

`=>` S + started / began + to V / Ving + time trong QK

`=` S + have / has + V3 / PII + for / since + time / timeline

$3.$ The last time I met her was 2015.

`=>` S + have / has + not + V3 / PII + for / since + time / timeline

`=` The last time + S + V2 / V-ed + was + time trong QK

$4.$ My father has never visited Ha Long before.

`=>` This is the first time + S + V2 / V-ed

`=` S + has / have + never + V3 / PII + ( before ).

$5.$ We haven't eaten this food for ten years.

`=>` It + be + time + since + mệnh đề QKĐ - S + V2 / V-ed

`=` S + have / has + not + V3 / PII + for / since + time / timeline