yes
That IS a sentence.
She couldn't control her anger when she found out about the betrayal.
I can understand your anger but your intemperancesare excessive.
My farms are funny
The idiom, at sixes and sevens means that you are in a state of panic, confusion and uncertainty. You could use this idiom in a sentence by saying, she was at sixes and sevens as to whether or not to tell her best friend that her husband was being unfaithful.
My cousin's current favorite idiom is 'as nice as spice'.
He has a propensity for anger.
To include an idiom in an example sentence, simply incorporate the idiom naturally into the sentence to convey a figurative meaning. For example, "She had a chip on her shoulder" is an idiom meaning she was easily offended or held a grudge.
A sentence could be: I will give you money when pigs fly
He showed his true colors when he did that.
He had to curtail his anger