1.該問句變成陳述句是：you are/I am going to do what with that vase.
2.do with短語的完整寫法是：do sth with sth.
所以,what是do的賓語,并非that vase的賓語補(bǔ)足語.
3.該短語do sth with sth比較特別,第二個(gè)sth指的是具體的事物,而第一個(gè)sth一般是something/nothing/nothing/more/little/a little/a lot這樣的不定代詞,對(duì)上述代詞提問時(shí),也還是用what提問.
4.如：
1）I can do nothing with this problem.
2) I want to do something with the case.
5.類似的短語還有know/learn sth with sth.
如：I'd like to know more about your school.