1. It's over 3 months since Tom had his hair cut

2. It's years since I enjoyed myself som much

3. It's 2 years since I ate this kind of food

4. It's hours since Mary rang

5. It's 2 years since my father was to Vung Tau

C1: It's + time + since + S + V2/ed = S + have/has not + V3/ed + for time

C2: S + have/has not + V3/ed + for time = The last time + S + V2/ed + was time ago

`1`. `\text{ It's over 3 months since Tom had his hair cut }`

`2`.`\text{ It's years since I enjoyed myself }`

`3`.`\text{ It's 2 years since I ate this kind of food }`

`4`. `\text{ It's hours since Mary rang }`

`5`. `\text{ It's 2 years since my father was to Vung Tau }`

______________________________

`\text{ Ta có công thức: It's + thời gian + since + S+V(ed)+.... }`

$#Nu:)))$