Réponse:

1. they are always happy to have guests.

2.We never laugh at people in trouble.

3.I'm usually busy on Wednesdays.

4.every winter birds build their nets on this roof.

5.they sing generally very loudly.

6.Dalit is rarely late for school.

7.My parents help me hardly ever with my homework.

8.My parents from time to time visit us.

9.We are often at home on Saturday.

10.The secretary works five days a week here.

11.We have fish sometimes for lunch.

12.Sharon has lunch seldom before two o'clock