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do prep
do prep 是常用搭配，prep前通常不加冠词。
She spends two hours doing prep every evening.
她每天晚上花两个小时做预备功课。
课外作业；家庭作业
先理解核心含义，再看它在真实句子里的用法。
课外作业；家庭作业
school work done outside school, especially at home; homework
She spends two hours doing prep every evening.
她每天晚上花两个小时做预备功课。
预备学校的课外作业(尤指在家完成)
preparatory school work done outside school (especially at home)
I have a lot of prep to do tonight before the exam.
考试前我今晚有很多预习要做。
She spends two hours every evening on her prep for classes.
她每晚花两小时做课前预习。
The teacher assigned a lot of prep over the weekend.
老师周末布置了很多预习作业。
do prep 是常用搭配，prep前通常不加冠词。
She spends two hours doing prep every evening.
她每天晚上花两个小时做预备功课。
We have a lot of prep tonight.
我们今晚有很多预备功课。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
做课外作业
We have to do prep in the evening.
我们晚上必须做课外作业。
完成课外作业
Finish prep before watching TV.
看完电视前先把课外作业完成。
布置课外作业
The maths teacher set us prep for the weekend.
数学老师给我们布置了周末的课外作业。
交课外作业
All students must hand in their prep on Friday morning.
所有学生必须在周五早上交课外作业。
批改课外作业
The tutor spends an hour marking prep each day.
导师每天花一小时批改课外作业。
Use prep naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把prep想成prepare的缩写：放学回家要“准备”的功课，就是课外作业。
语域：informal 常见场景：school、UK boarding schools、student conversation prep 作名词时多用于英式校园口语，指预备学校或寄宿学校的课外作业（尤指在家完成），正式书面语中通常说 homework 或 assignment。
（尤指私校的）家庭作业；预备学校功课
Dictionary facts from ECDICT, WORDNET.