1. you mustn't enter the shop without a face mask.
2. If you have a headache , you should take painkillers.
3. you shouldn't spend too much time watching TV.
4. she has got the flu. she should stay in bed.
1. you mustn't enter the shop without a face mask.
2. If you have a headache , you should take painkillers.
3. you shouldn't spend too much time watching TV.
4. she has got the flu. she should stay in bed.