10 oraciones en pasado con could y couldn't?

1. You should drink a glass of water

2.

You should tell the teacher

3.

You should see a dentist

4.

I should study this chapter for the exam

5.

You should do your homework

1.

We shouldn't arrive late

2.

I think you shouldn't work harder

3.

You shouldn't have told me you were going to arrive late

4.

You shouldn’t invest in gold

5.

You shouldn’t catch that train.