Can I introduce the assistant director, Mr Jones?

Yes         No

She never tells me anything about her plans.

Yes        No

It's been ages since you wrote to me. What's wrong?

Yes        No

I don't think I'll ever learn to ride a bicycle.

Yes        No

We didn't realise that she couldn't come today.

Yes        No

Would you like some sugar in your tea?

Yes        No

The number 32 bus goes to Putney from here.

Yes        No

Empty the water from the pot before you use it.

Yes        No

If that pot is empty, you can use it.

Yes        No

Gold is a metal which does not rust or tarnish.

Yes        No