I don't understand.

How to say...?

I don't know.

Can you repeat please?

I'm hungry.

I'm thirsty.

I'm tired.

I need to go.

What are you doing?

I forget.

I can't remember.

Who are you?

Where are you?

How old are you?

I'm going to the store.

I want coffee, please.

I want to drink coffee.

I want to eat something.

Do you want to eat something?

Do you want to drink something?