"doesn't know his ass from his elbow" in Chinese (Simplified)

• 一窍不通
• 什么都不懂

Definition

这个非正式且幽默的表达，表示某人对自己应该懂的事情完全一窍不通或毫无头绪。

Usage Notes (Chinese (Simplified))

极其口语和幽默，有时带贬义。常用于指出某人在某方面非常无知，尤其是应该了解的事。避免用在正式场合。

Examples

He doesn't know his ass from his elbow when it comes to cooking.

他做饭的时候**一窍不通**。

My boss doesn't know his ass from his elbow about computers.

我的老板对电脑**一窍不通**。

She doesn't know her ass from her elbow in math class.

她在数学课上**什么都不懂**。

Honestly, he doesn't know his ass from his elbow when fixing cars, so don't ask him for help.

说真的，他修车**一窍不通**，就别找他帮忙了。

I tried to explain it, but she doesn't know her ass from her elbow on this topic.

我试着解释了，但她在这个问题上**一窍不通**。

You can tell he doesn't know his ass from his elbow just by the way he answers questions.

看他回答问题的样子就知道他**什么都不懂**。