1. My sister started her new job two years ago.

2. Rooms should be cleaned everyday.

3. We haven't seen each other since I left Ha Noi.

4. My father came home from work until 9 o'clock.

1. My sister/ start/ her/ new/ job/ two/ years/ ago.

=>My sister started her new job two years ago.
2. Rooms/should/be/ clean/everyday.

=>Rooms should be cleaned everyday.
3. We/ not/ see/ each other/ since/ I/ leave/ Ha Noi.

=>We haven't seen each other since I left to Ha Noi.
4. My father/ come/ home/ work/ until/ 9 o'clock.

=>My father came home from work until 9 o'clock.