12 предложений с модальными глаголами can, could, should, must.

I can watch TV after I have done my homework. I could ask my mum for help if I need it. I should behave well in school. I must be quiet during lesson. I can eat dessert after lunch. Mum, could I ask you for some pocket money?  I should walk the dog every morning. I must clean my room myself. I can go for a walk with my friends on weekends. Could you please help me with the task? I should listen to my parents. I must study hard.