2. Present Simple
It can have a future meaning when used with timetables:
The train departs at 17.30.
3. Present continuous
It is used with arranged plans where details are given:
I'm visiting my friends on Saturday.
4. Going to
It is used with arranged plans where details are not given:
I'm going to visit my friends.
5. Will
It is used with offers, promises, threats, requests and decisions made at the moment of speaking.
6. Will - Offers
Shall I open the window?
7. Will - Promises
If you can't come, I'll take it to you.
8. Will - threats
I'll tell them off.
9. Will - requests
Will you open the door for me?
10. Will - Shall
Shall is used with I and we.
Shall we go now?
Will is used with the other pronouns.
Will you go now?
11. Future Perfect
It is used to say that something will be finished by a definite moment:
Next Friday he'll have finished his project.
12. Future Continuous
It is used to say that something will be in progress in a moment.
Next Friday we'll be celebrating your birthday
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