The secret is to think in logical, coherent sentences, which most people don't do.

He seemed to understand a lot, but he couldn't write a coherent sentence.

One who could construct a coherent sentence without having to engage in a conference call with friends.

Like Bush, she can barely string together a coherent sentence.

Surprised and pleased that I could form a coherent sentence.

He tried to say something, but wasn't able to get a coherent sentence out.

It was the first coherent sentence Joe had heard the man utter.

I could hardly make a coherent sentence when he started to talk to me.

Believe it or not, the woman running communications can barely speak a coherent sentence.