What do bees do in Chinese? 請問這個句子為什麼要用兩個do 實在看不懂這句子的文法?

問句時會把動詞的時態抽出用原形動詞寫句子。假如不明白看看以下比較

What does a bee work at home?
主詞的bee單數"一隻蜜蜂"便把does從動詞中抽出來發問。
work是原形動詞。不是問句時會寫成：A bee works at home.
What do bees work at home?
主詞是bees"眾數多隻蜜蜂"便把do從動詞中抽出來發問。
work是原形動詞。不是問句時會寫成：Bees work at home.

這句的動詞是Do(好像問work)，由於要問那些多隻蜜蜂做甚麼的，因此把時態抽出來便是把do從動詞的Do抽了出來成為問句。

其他動詞當作成問句都有這情況：

What do they want to do?
What do we need to have to complete the task?
How do airplanes fly?/How does an airplane fly?
Why do you cheat?
Why does he leave his job?(現在時態=問他現在離職的理由) Why did he leave his job?(過去時態=問他當他離職時原因)
...

真的想問你是國幾?難道現在國一英文課本第一課，沒有 “How do you do?” 的句子，算了，前面一個是助動詞，後面是主動詞，回去讀書吧。