Will.- 100% Yes. It will happen. It definetely will.
Won't.- 100% No. It won't happen. No way.
Might.- 50% maybe. It may happen. Perhaps, it depends.
- Next week I am going to visit my granny. I've got the flight tickets.
- Next week I will go to visit my granny. I still have to buy the tickets.
- Next week I won't go to visit my granny. She is going to be on a cruise ship.
Going to.- 100% Yes. It is decided or planned. You've been thinking about it.
Will.- 75% Yes. It's not 100% sure. It is not decided yet. Last minute decision.
Won't.- 100% No. It won't happen. No way.
Will / Shall
- I have just decided. Tomorrow I will go to London!
- Mmm, I think tomorrow is gonna rain. I won't go to the beach then.
- Shall I go to London tomorrow with Ann?
- Shall we eat pizza tonight?
- Will they come to the party?
- Will your mother com to the meeting?
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Going to / Gonna
- Tomorrow is going to rain. (Formal)
- Tomorrow is gonna rain. (Informal)
- It's going to rain tomorrow.
- It's gonna rain tomorrow.
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Present Continuous
- My auntie is playing tennis tomorrow at three o'clock in the afternoon.
- My brother is taking an exam in two weeks time.
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Present SImple
- The bus leaves at 05:30.
- The classes start at 09:00.
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To be about to
- The train is about to arrive.
- The exam time is about to finish.
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Future Continuous
- My friend will be sitting for an exam by this time tomorrow .
- By this time tomorrow he will be driving his new car.