will or going to
We already bought the tickets. We ___ visit Cuenca on Saturday.
are going to
late / will / probably / she / arrive
She will probably arrive late.
They is going to play soccer after school.
Wrong → They are going to play soccer after school.
The doorbell is ringing. “I ___ get it!”
will
Use WILL for a spontaneous decision made now.
next month / a new phone / to / he / buy / going / is
He is going to buy a new phone next month.
We are going to travel to Quito next weekend.
Correct
That glass is right on the edge of the table! It ___ fall!
is going to
There is clear present evidence that the event is likely to happen.
Mars / one day / people / think / travel / I / to / will
I think people will travel to Mars one day.
I will to help you with your homework.
Wrong → I will help you with your homework.