chuyển đổi thì hiện tại hoàn thành và quá khứ đơn
1. she hasn't gone out for five years
-> she last........................................................
2. I and my sister last talked to each other two months ago
->I and my sister haven't..............................................................
3. the last time she travelled by air was in 2019
->she hasn't ..........................................................
4. she hasn't fallen in love with anyone for year
-> It's year ......................................................................
5. my parents have been married for 20 years
-> It's 20 years .........................................................