`1,` I last saw him 8 days ago.

`2,`

+) I last took a bath on Monday.

+) The last time I took a bath was on Monday.

`3,` The last time Lucy visited me was in February.

- S + last + Ved/V2 + O + thời gian

= The last time + S + Ved/V2 + O + was + thời gian

-> S + has/have + not + Vpp + O + for/since + thời gian

- for + khoảng thời gian , since + mốc thời gian

`4,` How long is it since he had this car?

- How long + has/have + S + Vpp + O?

= How long is it since + S + Ved/V2 + O? 

$#Hannahvanha :)$

`1`. I haven't seen him for 8 days

`->` I last saw him 8 days ago.

Gỉai thích cấu trúc: I last + saw/took + [object] + [time period] ago.
   
`2`. I haven't taken a bath since Monday

`->` I last took a bath on Monday.
`->` The last time I took a bath was on Monday.

Gỉai thích cấu trúc:

`_` I last + took + [object] + on + [time/day].

`_` The last time + [subject] + did + [action] + was on + [time/day].

`3`. Lucy hasn't visited me since February

`->` The last time Lucy visited me was in February.

Gỉai thích cấu trúc:

`_` The last time + [subject] + did + [action] + was in + [time/month].

`4`. How long has he had this car?

`->` How long is it since he got this car?

Gỉai thích cấu trúc:

`->`How long is it since + [subject] + got + [object]?