Call – phrasal verb
Call for – to need something
They called for help.
Call for – publicly demand something
The media has called for the minister to resign.
Call in – telephone a place, esp. where you work
He’s called in sick today.
Call off – to cancel
The unions have called off the 24-hour strike.
Call on/upon somebody – ask/demand that someone does something
I call on you to sort out this mess.
Call somebody out – ask someone to come in an emergency
We called out a plumber on Saturday afternoon.