I'm at a loss for words.

I can only wonder if this is the same for everyone else.

It would take forever for me to explain everything.

Thanks for your explanation.

Why are you sorry for something you haven't done?

This is what I was looking for!" he exclaimed.

It's impossible for me to explain it to you.

I'd like to stay for one night.

I would like to give him a present for his birthday.

If you know that something unpleasant will happen, that you will go to the dentist for example, or to France, then that is not good.