Considering the following situations, create sentences using the modal verbs (must and should), which have been explained in the video, in order to tell people if they must or should do something:


1-Your best friend have a seminar to be presented the day after tomorrow, but she/he hasn’t started it yet.

2-Your sister’s boyfriend has broken up with her last week. Since then, she has been very sad.

3-Your mother is very tired because she cleaned all the house by herself.

4-You are travelling by plane with your little brother. The plane is almost taking off, but your brother’s seatbelt is unfasten.