Example Question: Difference between 'plan' & 'arrangement'

[Minoo 344]

(Module 10 – I’m doing or I’m going to do)

What’s the difference between a personal plan (I'm going to do it tomorrow) and an arrangement (I'm doing it tomorrow)?

 

[Minoo 344]

A ‘personal plan’ is something YOU have decided to do; it’s YOUR intention to do it; no-one else is involved. Use the 'going to' future: I'm going to do it tomorrow.

An ‘arrangement’ involves other people, e.g. an appointment, or an external event, e.g. a flight. Use  'Present Continuous + future time marker': I'm doing it tomorrow.