He played all the instrument parts by himself using multitrack recording.

It is important for each person to fulfill their role.

I went to see a movie by myself.

Watching a movie alone is enjoyable.

Which part of the orchestra do you play?

He solved all the problems entirely.

He lost everything.

I will work using this laptop.

He is good at handling multiple tasks at the same time.

I have the audio recording of that meeting.