Réponse :

Ex1

1- When you play tennis, you should watch the ball

2- It's late and you're very tired. You should go to bed.

3- You should eat plenty of fruits and vegetables.

4- If you have time, You should visit the science museum.

5- When you're driving, you should wear a seat belt.

6- It's to far to walk from here to the station. You should take the car ? jsp je vois pas la fin de la phrase mais c'est you should en tout cas.

Ex 2

You are in a shop. you are trying on a jacket. (Buy ?)

You ask your friend : Should-I buy this jacket ?

You can't drive (Learn?)

You ask your friend: Do you think that i should learn to drive ?

You don't like your job. (Get another job?)

You ask your friend: Do you think  that i should get another job?

You are going to have a party (Invite Gary ?)

You ask your friend: Should i invite gary ?