WE USE GOING TO RATHER THAN WILL WHEN WE PREDICT THAT STH WILL HAPPEN IN THE FUTURE BECAUSE WE HAVE SOME EVIDENCE FOR IT NOW.
'What's that matter with her?' 'She thinks she's going to faint.'
HOWEVER, IF WE MAKE A PREDICTION BASED ON OUR OPINION OR OUR PAST EXPERIENCE WE USE WILL:
I imagine the stadium will be full for the match on Saturday.
- WHEN WE TALK ABOUT INTENTIONS OR DECISIONS ABOUT THE FUTURE THAT WERE MADE SOME TIME BEFORE WE REPORT THEM, WE PREFER GOING TO OR THE PRESENT CONTINUOUS
' Who's arranging the party?' ' Jo's going to do it.'
( this has been planned )
Toni told me that she's going to move back to Spain.
( reporting an intention )
PRESENT CONTINUOUS FOR THE FUTURE WHEN WE TALK ABOUT AN INTENTION TO DO STH IN THE FUTURE, ALTHOUGH NO DEFINITE ARRANGEMENT HAS BEEN MADE, WE PREFER GOING TO RATHER THAN THE PRESENT CONTINUOUS. TO EMPHASISE THAT WE ARE TALKING ABOUT A DEFINITE ARRANGEMENT, WE PREFER THE PRESENT CONTINUOUS.
When we report a request or command, we often use the pattern ask / tell / order someone + infinitive: The teacher asked the students to close their books. When the request or command is negative, we use the pattern ask / tell / order someone not + infinitive: The doctor told them not to worry.
In reported questions we use ask, want to know + when, where, how, what, etc. We use the same word order as in statements: 'Where do you come from?' = She asked me where I came from. If there is no question word, we add if or whether. 'Do you speak French?' = He wanted to know if/ whether I spoke French.