Eg: Do come on time tomorrow.

明天一定准时来！

youdao

Do come on time.

务必请准时来。

youdao

Do come on time.

一定要准时参加。

youdao

and I come here on my spare time and do volunteer coaching for little league team.

我只是在业余时间里来这边，为一些小型联赛队伍义务执教。

布朗克斯的足球教练 - SpeakingMax英语口语达人

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