I would prefer not to discuss it on the phone.

"If you don't mind, I would prefer not to discuss the matter."

I would prefer not to discuss the matter over the phone.

This was something he preferred not to discuss with her.

It was a matter he preferred not to discuss here.

American officials call the whole issue delicate and say they prefer not to discuss it.

But I'd prefer to discuss it somewhere else, if we might.

"I should prefer not to discuss that over the phone."

I would prefer us to discuss first what should form part of Agenda 2000.

If you prefer to discuss games, wake up your wife.