Question

Her inhuman behaviour vexed me(change the volice)

Answer 1

hlo mate

here is your answer

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I am vexed by her unhuman behaviour.

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hope it helps you

Answer 2

Her inhuman behaviour vexed me.
=) I was vexed by her inhuman behaviour.

Structure :
Object =) Subject +was/were+v3 +by+ Subject =) Object

Hope it helps