你知道他们是在哪做实验吗 翻译成英语.说明句式,划分句子成分.

Do you know where are they doing the experiment?

do you know where are they carring on experiment?

Do you know where they do the experiments?
1.know后面引导宾语从句.
2.宾语从句要注意陈述句语序.
3.这里的时态也并非一定要用现在进行时

Do you know where are they doing the experiment ?宾语从句，you是主语，know是谓语动词，where从句是宾语丛句。