How do I tell my brother that he needs to wake up early tomorrow?

Tomorrow we are having breakfast together.


Tomorrow we are going to have breakfast together.


I personally would say - Brother, you have to get up early tomorrow, as we'll be having breakfast together.

  • —or because we’ll be having breakfast together. (Or of course you could just let a bucket of cold water do the talking for you.) – Brian Donovan Apr 5 '15 at 12:06

Tomorrow we will be having breakfast, so wake up early.

  • Welcome to ELU. But why "will" and not "are having" or "are going to have". It's good to explain your answers. – Peter Shor Apr 5 '15 at 10:27

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