Two things you must do if you've been invited to a wedding.
answer the invitation, buy / get an outfit and follow the dress code, take photos, dance
Three things you don't have to do when you're on holiday.
work or go to school, get up early, do homework...
Two things you have to do after class today.
do homework, tidy my room...
Three things you shouldn't do before you go to bed.
You shouldn't use digital technology, take sleeping pills, drink coffee or alcohol, work in the bedroom, eat fatty foods, exercise
Two things a teacher has to do before class.
prepare the lesson, find or make material, mark the homework
Two things you should do and two things you shouldn't do when you have a job interview.
You should dress smartly and prepare for the interview. You shouldn't be rude or swear.
Two things you should think about before you buy a new phone.
what you need, battery life, internal storage, camera quality, price...
Two things you shouldn't do the night before an exam.
stay up late, panic, not do other homework
Two things you must do and two things you mustn't do when you're driving.
You must pay attention and use your mirrors. You mustn't drink and drive or use your mobile.
One thing you had to do in your English class last year which you found very difficult.
grammar, vocabulary, writing, reading, listening, speaking...
Two things you must do and one thing you mustn't do when you are going on a long journey by car.
You must be prepared and check the car. You mustn't complain too much.
Two things you don't have to do if you shop online.
leave the house, get to the shops, queue, wear a mask...
Two things you shouldn't do if you have flu.
take cough medicine, take antibiotics, lie down, take a cold shower, go to work or school