A square has four sides.
I paid him four dollars.
We got up at four in the morning.
I am supposed to meet him at four.
He's been sick in bed for four days.
All four of the boys didn't have alibis.
He promised me that he would come at four.
She'll spend the next four years in prison.
I'd like to reserve a table for four at six.
I asked her to make four copies of the letter.
Tom likes oranges and eats three or four a week.
I studied English for four years with a native speaker.
Tom has been convicted of drunken driving twice in the last four years.