हमेशा  =  at all times
He nearly always wears a bow-tie.

कभी भी  =  at any time
The can always go to the bank if they need more money.

हमेशा  =  for all future time
Promise me you'll always keep in touch.

हमेशा  =  regularly
The milkman always come sat 7.30.

सदा  =  throughout a period of time
She has always loved gardening.

हमेशा  =  repeatedly
She's always looking for faults.