Переделайте эти утвердительные предложения в отрицательные и вопросительные:
1) he is happy
2) his computer is old
3) Vera is his wife
4) they are his sons
5) it's cold today

He is happy.
Отрицательное: He is not happy.
Вопросительное: Is he happy?

His computer is old.
Отрицательное: His computer is not old.
Вопросительное: Is his computer old?

Vera is his wife.
Отрицательное: Vera is not his wife.
Вопросительное: Is Vera his wife?

They are his sons.
Отрицательное: They are not his sons.
Вопросительное: Are they his sons?

It's cold today.
Отрицательное: It is not cold today.
Вопросительное: Is it cold today?