Can – уметь, мочь Should – должен Must – обязан
+I can do this task. - I cant do this task. ? Can I do this task? - Yes, I can. - No, I cant.
+I should clean my room every day. - I shouldnt clean my room every day. ? Should I clean my room every day? - Yes, I should. - No, I shouldnt.
+They must work hard. -They mustn't work hard. ?Must they work hard? - Yes, they must. - No, they mustn't.
I …swim very well. I …help the old people. I …use a dictionary on my English lessons. I …talk loudly on the lessons. I …wash the dishes after the supper.
I can help you, …? I must close the door of my flat, …? I should go to the gym, …? I can play the violin, …? He should invite you, …?
Я умею кататься на коньках (skate). Я обязан слушаться моих родителей. Я умею играть в футбол. Я должен делать свою домашнюю работу.