Это грамматика языка. автор барашкова! буду если ! пример: he can skate, can't he? he could skate, couldn't he? 1. he can go, 2. she can 3. they can play 4. the boys can speak 5. you can come at 9 o' 6. they could dance 7. she could count 8. he could speak 9. it is the most interesting 10. they are