“准时做作业”英文为“do homework on time”。

这个短语的来源可能源于人们日常的学习行为，即在规定的时间内完成作业。

例句：

"It's important to do homework on time so you don't fall behind in your studies."
("准时做作业很重要，这样你才不会在学习中落后。")
"I always try to do my homework on time, but sometimes it's hard to stay focused."
("我总是尽量准时做作业，但有时很难保持专注。")
"If you want to succeed in school, it's essential to do your homework on time."
("如果你想在学校里取得成功，准时做作业是非常重要的。")