He did by half-measures what he promised, leaving the job unfinished.

The phrase 'did one's job' describes someone who performed their responsibilities.

When he reflected on his life, he felt guilty for how he did unto others and decided to apologize.

When no one else would speak up, Maria did the right thing and defended the newcomer.

When everyone else hesitated, Maya did the handsome thing and returned the lost wallet.

Each of us did one's bit to help clean the park after the festival.

When I realized I did somebody wrong by spreading that rumor, I apologized and tried to fix it.

You looked worried before the interview — how did it go?

When the performance fell apart, one did one's thing and kept playing calmly, which won over the crowd.

I never did — what a surprise to see you here after all these years!