WILL OR BE GOING TO?

When do we use “wil” or be going to” for future?

v  I am going to see a famous person.

v  I will see a famous person

Both examples are correct because they are predicting about the  future.

v  I bought some eggs. I am going to prepare scrambled eggs for dinner. I use “going to “ to express a prior plan. I thought about it before the moment of speaking.

v  I am tired and I can´t lift this box. I need help! 

v  I will help you.    “Will” is correct because the decision the speaker makes is at the moment of speaking.

If you want to use “probably”, follow this rule:

Affirmative:       You will probably leave early.

                            You are probably going to leave early.

Negative:          You probably won´t leave late.

                           You probably aren´t going to leave late,

Let´s see the immediate future by using the idiom  “be about to …”

Example:  I always go to work at 7:45 a.m. it is 7:44, so I am about to go to work.