I know I can say

The streetlights come on automatically at dusk.

Now suppose that you and your friend have been waiting for a bus for a while.

And you turn and say

The bus should come on at any minute.

Is that a proper usage for the phrasal verb "come on"?

My intention behind using "come on" instead of simple come is that I think using "come one" implies there is kind of schedule for the buss departure. I am not sure though.

  • 1
    on refers there to the active state. There is no implication of anything to do with time or schedules. The lights come on when you clap your hands. – Tᴚoɯɐuo Nov 10 '18 at 16:34

Your first example refers to the following usage:

come on:

to begin to operate:

  • Set the oven to come on at six.
  • When does the heating come on?


As for the bus I think you should use arrive or come:

The bus should arrive/come/be here any minute.

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