Перевести The children are at school today.Where were they yesterday?

The children are at school today. — Дети сегодня в школе.

Where were they yesterday? — Где они были вчера?

The children are not at school today. (Negative is formed auxiliary verb + not)

Are the children at school today? (Interrogative is formed auxiliary verb + subject)

Who is at school today?

Where are the children today?

When are the children at school?

Are the children or is the child at school today?

Are the children at school or in the park today?

Are the children at school today or that day?

The children are at school today, are not they?

The children are not at school today, are they?