The document discusses two ways to talk about the future in English: will and be going to. Will is used for predictions and statements of fact about the future, such as "In the year 2050 all students will have their own computers in school." Be going to is used to talk about intentions or plans for the future that have already been thought about, like "I'm going to work in a bank when I leave school." Both will and be going to can be used in affirmative, negative, and interrogative sentences.

1. FUTURE TENSES
WILL AND BE GOING TO

2. WILL:
 The auxiliary verb will is used in making predictions or simple
statements of fact about the future.
AFFIRMATIVE:
In the year 2050 all students will have their own computers in
school.
NEGATIVE:
You won't pass your exams if you don't start working harder.
INTERROGATIVE:
Will it snow for Christmas?

3. BE GOING TO
The auxiliary verb going to is used in talking about
intentions. (An intention is a plan for the future that
you have already thought about.)
Affirmative:
I'm going to work in a bank when I leave school.
Negative:
I'm not going to watch TV until my science project is
finished.
Interrogative:
Are you going to play basketball after school?