1.On-the-spot spontaneous decisions (at the moment of speaking), unplanned actions:
I’m so hungry! I’ll have dinner.
The doorbell rings. I’ll go and open the door.
2.Promises, offers (Shall I …?/I’ll), suggestions (Shall we..?), requests (Will you…?), refusals
I promise I won’t let you down.
Shall I close the door?
Shall we meet tonight?
Will you give me a hand?
I won’t go there!
3.Generals predictions about the future (with no evidence – we don’t have proofs) based on what we think or believe:
We use I think, Maybe, Perhaps, Probably, Possibly, I hope, I expect etc.
I think people will use food 3D printers in 50 years.
I expect we will invent a cure for cancer in the nearest future.
+Actions in the future we are not sure about, possible actions
We use I think, Maybe, I hope, Perhaps etc.
Maybe I’ll go the concert tomorrow but I’m not sure.
4.Objective truth , a fact about the future
It will be our first meeting in 10 years!
Tomorrow will be their 30th wedding anniversary!
be going to + V1
1.Plans and intentions in the future:
We’re going to play volleyball today.
She’s going to watch a comedy tonight.
2.Predictions about the future based on evidence (what we see) or on what we know:
Look at those clouds! It’s going to rain.
She’s so fast! She’s going to win.
Tomorrow at 7 we’re having a meeting.
I’m having an interview at 5.
The train arrives at 5 p.m.
The class starts at 3 p.m.