He caught the ball with a swift movement.

Surprised by the sudden heavy rain, I forgot my umbrella.

He has acquired the skill of speedreading, allowing him to read many books.

He finished reading the book by speedreading.

He started running swiftly.

He caught the ball with a quick movement.

It's better for him not to know the truth. After all, ignorance is bliss.

He is feigning ignorance about that problem.

He knows that pain through his own experience.

I have no way of knowing what he is thinking.