My name is Jack.

The cones of the jack pine, for example, do not readily open to release their seeds until they have been subjected to great heat.

They made fun of Jack's haircut.

She said that she would visit Jack with her sisters.

He is my friend whose name is Jack.

Suddenly, Jack realized what had happened to him.

Was it Jack that broke the window?

With the money Jack won from his lawsuit, he should be able to live on easy street.

We elected Jack chairman.

I want to buy the same watch as Jack has.

I had intended to call on Jack.

It was Jack that I met yesterday.

It was Jack that broke the window yesterday.

She came across Jack yesterday.

Working hard made Jack what he is.

We talked over Jack's plan to put in air conditioning, but could not come to a decision.

No other boy in our class is more studious than Jack.

Robert got the better of Jack in the game of chess.

Mary blamed Jack for leaving their children unattended.

Mary swims as fast as Jack.