He asked us to explain what had happened to the cover.

He at once asked me to explain how they worked.

Don't ask me to explain what went wrong with him.

They never asked us to explain what we had done.

She asked me to explain my project to the class.

But don't ask me to explain what he did and didn't do.

But when I asked her to explain everything, she couldn't.

The others often ask him to explain sexual terms they do not understand.

She asked me to explain how I appeared in the other form.

When people asked me to explain what exactly it was, I could not.