Question

请问这句的句子成分是？越详细越好，谢谢。

They've done everything they can possibly think of
凡是能想到的，他们都去做了

Answer 1

主句:They've done everything 定语从句:they can possibly think of修饰everything，前面省略了连接代词what或that。春斗
如果不省略:
They've done everything (what) they can possibly think of.这扒颤磨里what代表everything，又作洞肢of的介词宾语。

Answer 2

They（主）e done（谓） everything（宾） 【they主 can possibly（帆扒状） think of（谓）定语从尺轿棚句（省略引陵则导词that)】

Answer 3

定搜森语从句，主语they，谓语have done，宾语everything；从句they can possibly think of作everything的定语，省略了that/which/..（兆漏庆族握在从句中作宾语）