She had suggested, playfully, that she should join her pen to his—that they should collaborate.

As soon as he gets out of the army he and I are going to collaborate on a play.

We are going to collaborate on a play and, oh, we have planned to do lots of things.

What I was going to suggest was that you and I should collaborate.

I think you were born to collaborate, and to collaborate with me.

To collaborate with Trenchard was to collaborate with a human volcano.

To collaborate with Monsieur Jacquemin will be very amusing.

And he added, grinning expectantly, What do you collaborate in?

They collaborate in a blend of comic opera and musical comedy.

The leaders will thieve and collaborate with organized crime.