Twice two is equal to four.
If you take four from ten, you have six.
You get off at Yotuya Station.
I have been walking for over four hours.
The rain lasted four days.
Pepperberg can show Alex two objects (for example, a green square and a red square) and ask, "What's different?"
The lake is four miles across.
You had better not use those four-letter words.
The plays of Shakespeare fall into four periods.
One, two, three, four, five, six, seven, eight, nine, ten.
A 40- or 50-year-old is a snot-nosed brat.
A parallelogram is a quadrilateral formed from two sets of parallel lines.
A square is a quadrilateral with four sides the same and where all four corners are right angles.
In the first month of that year, I saw that it snowed for four days from the 14th until the 17th.
Mars, the red planet, is the fourth planet.
They'll get out of class in forty minutes.
From home to work, it takes 40 minutes.
A "yo-ji-juku-go" in Japanese is an idiom made from a compound of four characters.