He likes Stinky Tofu.

He doesn’t like Stinky Tofu.

They ate the pizza.

They didn’t eat the pizza.

My brother walks our dog every night.

My brother doesn’t walk our dog every night.

She sang for us last night.

She didn’t sing for us last night.

I’m hungry.

I’m not hungry.

They were very tired last night.

They weren’t very tired last night.

Your brother’s handsome.

Your brother’s not handsome. Your brother isn’t handsome.  or 

I’m planning to go to the swimming pool tomorrow morning.

I’m not planning to go to the swimming pool tomorrow morning.

I’m leaving.

I’m not leaving.

He’s studying for his tests.

He’s not studying for his tests. He isn’t studying for his tests.  or 

We are visiting my cousin next week.

We’re not visiting my cousin next week. We aren’t visiting my cousin next week.  or 

I found the magazine you were looking for.

I didn’t find the magazine you were looking for.

She turned off the light when she left the room.

She didn’t turn off the light when she left the room.

My sister is going to the U.K.

My sister isn’t going to the U.K. My sister’s not going to the U.K.  or 

She thinks you’re nice.

She doesn’t think you’re nice.

He wants to find a new job.

He doesn’t want to find a new job.

It’s small!

It isn’t small! It’s not small!  or 

Tell me what you think.

Don’t tell me what you think.

He went upstairs.

He didn’t go upstairs.

I want to know.

I don’t want to know.