Be (as) stubborn as a mule phrase informal simile
Be extremely stubborn
Mina is as stubborn as a mule. She doesn't like broccoli and she won't eat it even if you pay her.
She won't do what you tell because she's as stubborn as a mule.
The boy is as stubborn as a mule. He is bent on buying that motor.
Used to describe someone who is realistic and determined
The verb "be" should be conjugated according to its tense.
Used when there are too many people involved in a task, and this can lead to a failure or its likely outcome isn't good
I think five people should be enough in our project. You know, too many cooks spoil the broth.