Simple present tense in positive and negative sentences

Front

Is this a desk?

Back

No, it isn't

Front

Is this a ruler?

Back

No, it isn't

Front

Is this a fan?

Back

Yes, it is

Front

Is this a pencil case?

Back

Yes, it is.

Front

Is this a pen?

Back

No, it isn't

Front

Is this a scissor?

Back

Yes, it is.

Front

Is this a screen projector?

Back

Yes, it is.

Front

Is this a broom?

Back

Yes, it is.

Front

Is this a mop?

Back

No, it isn't.

Front

Is this a bag?

Back

Yes, it is