Verb to be (write sentences)

Write the following sentences into negative:

He is a pilot.

Write the following sentences into negative:

They are at the gym.

Write the following sentences into negative:

It is an interesting book.

Write the following sentences into negative:

They are married.

Write the following sentences into negative:

She is ten years old.

Write the following sentences into negative:

We are at home.

Write the following sentences into negative:

It is freezing today.

Write the following sentences into negative:

I am a singer.