For convenience, let's discuss this issue later.

He was nervous while waiting for the test results.

He is moving forward one step at a time.

He was wearing his coat as if he was about to go home momentarily.

He was thinking this way and that way.

Before I knew it, he had fallen asleep.

He was strumming the guitar noisily.

He is a musician from the core.

He started learning Japanese from the beginning.

He sat quietly and thought for a while.