2 錯

百度ai的回答：
"What is that supposed to mean?" - This sentence is absolutely correct! It's a common way to ask for clarification or to express confusion about something someone has said or done.
"What does that suppose to mean?" - This one has a small language issue. The correct form should be "What is that supposed to mean?" or "What does that mean?" The word "suppose" isn't used in that way in this context.
So, remember to use "What is that supposed to mean?" if you want to ask about the intended meaning of something. Hope that helps! Have a fantastic day!

好像没有suppose to do的用法吧，都是suppose加从句或者be supposed to do

be supposed to 可以算一个短语词了。不要用 suppose 的单词词义去纠结，就像纠结 look out 为什么是“小心”而不是“向外看”一样没有意义。