改错 Do be careful when do your homework

问题描述:

改错 Do be careful when do your homework

去掉be动词

实际上这句话没有错。在动词前面加 do 是起强调作用。
譬如: You look like your father. (你长得像你父亲)
You do look like your father. (你真是长得像你父亲)

第二个do改为doing
原句补充完整即为
Do be careful when (you're) doing your homework
翻译下来是当你在做作业时务必要认真

Be careful when you do your homework