1. We haven't met for a long time

2. It has been 2 days since I last took bath

3. She has had her new job for a year

4. It has been 2 years since I last went to Da Nang

5. It has been 3 months since she last drank coffee

6. It has been 5 days since my friend last called me

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

It is/It has been + khoảng thời gian + since + S + last + V2/ed + O

= S + haven't/hasn't + VpII + for khoảng thời gian

`1)` We haven't met for a long time.

`->` S + have/has (not) + V3 ...

`->` for a long time: trong một thời gian dài

`->` we là số nhiều `=>` have

`2)` It has been `2` days since I last took a bath.

`->` it has been [time] since S + V-ed: đã bao nhiêu thời gian trôi qua kể từ khi ai làm gì

`3)` She has started her new job for a year.

`->` S + have/has (not) + V3 ...

`->` she là số ít `=>` has

`4)` It has been `2` years since I last went to Da Nang.

`->` it has been [time] since S + V-ed: đã bao nhiêu thời gian trôi qua kể từ khi ai làm gì

`5)` It has been `3` months since she last drank coffee.

`->` it has been [time] since S + V-ed: đã bao nhiêu thời gian trôi qua kể từ khi ai làm gì

`6)` It has been `5` days since my friend last called me.

`->` it has been [time] since S + V-ed: đã bao nhiêu thời gian trôi qua kể từ khi ai làm gì

@nene