We use 'due' to say when something will happen or arrive. It shows a planned or correct time for an event or arrival.
The bus is due at five o'clock.
Her baby is due next month.
We use 'due' to explain the reason for something. It means 'because of' or 'caused by'. Usually, it is followed by 'to'.
The flight was cancelled due to rain.
He left early due to illness.
'Due' shows that something is right or fair to get, because of rules or good reasons. It means something is deserved or proper.
She received due respect from everyone.
Give due credit to your teachers.
'Dues' are payments or fees that someone must pay regularly, like membership or rent. We usually use it in plural for this meaning.
You must pay your dues on time.
He paid all his dues last week.
Rarely, 'due' can be used as a verb meaning 'to be owed' or 'to have to be paid'. This use is uncommon but found in legal or formal contexts.
The rent dues next week.
All payments are due by Friday.
In arts like ballet, 'due' (more commonly spelled 'duet' but historically 'due') means a performance by two people together.
They performed a beautiful due on stage.
She danced a due with her partner.