Future (will vs be going to)

WILL

I/We/You/They/He/She/It + will + do, eat, drink, sleep. 

I/We/You/They/He/She/It + will not (won’t) + do, eat, drink, sleep. 

Will + I/We/You/They/He/She/It + do, eat, drink, sleep?

A decision at the moment of speaking. 

John: The meeting is canceled tonight. 

Jana: Really? In that case, I will go and meet my friends. 

Tony: I told you to tidy up the living room. 

Aya: So sorry, Tony. I forgot. I will do it after lunch. 

A prediction based on opinion. 

For example,

I think people will work more from home in the future. 

The population of that country will reach 10 million by the year 2030. 

BE GOING TO  

POSITIVE

I + am going to + do, eat, drink, sleep + tomorrow. 

He/She/it + is going to + do, eat, drink, sleep + tomorrow. 

You/They/We + are going to + do, eat, drink, sleep + tomorrow. 

NEGATIVE

I + am NOT going to + do, eat, drink, sleep + tomorrow. 

He/She/it + is NOT going to + do, eat, drink, sleep + tomorrow. 

You/They/We + are NOT going to + do, eat, drink, sleep + tomorrow. 

QUESTION

Am + I + going to + do, eat, drink, sleep + tomorrow? 

Is + He/She/it + going to + do, eat, drink, sleep + tomorrow? 

Are + You/They/We + going to + do, eat, drink, sleep + tomorrow. 

A decision before the moment of speaking. A definite future plan.  

John: The meeting is canceled tonight. 

Jana: I know. I am going to meet my friends after this. 

I am going to meet my aunt next Friday. 

My friends and I are having dinner in our favorite restaurant tomorrow evening.