Просто после is ставим NOT
Sam is not in Africa
is not можно написать сокращенно isn't
The boy swam a lot in the river last summer
Did the boy swim a lot in the river last summer?
Did the boy swam a lot in the river or in the pond last summer?
Who swam a lot in the river last summer?
When did the boy swim a lot in the river?
Where did the boy swim a lot last summer?
The boy swam a lot in the river last summer, didn't he?
Леттербокс
Дэливер
Сорт
Сакс
Некст
Вандер
Пут
П.с. Надеюсь что с произношением у тебя всё в порядке.
When have you bought a computer?
What computer have you bought?
Is your new computer expensive?