I was wondering if there was any difference between the two forms of future.

I'm getting married in two days. I'm gonna get married in two days.

I'm leaving on 20th August. I'm gonna leave on 20th August.

Would you feel that there is any difference? Could you think of any situation one way to put it would sound unnatural or can it be used interchangeable in every case?

Thanks in advance
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Comments  (Page 2) 
I agree with Paco's lengthy analysis in the post above.

All I would add is that for the use of present continuous, preparations for the future event are not required to be started. It is primarily that with present continuous the event is more imminent and more assured from the present vantage point than with going to future.

(By the way, I'm about to come, for idiomatic reasons, would not likely be used-- it has sexual overtones.)

I just have one thing to add -- all these excellent replies address the difference between "I'm getting married..." and "I'm going to get married..." which was certainly the point of the question. Actually, however, the origianl question asked about "I'm gonna get married" and I don't think any of the replies have addressed the "gonna."

I just want to note that "gonna" for "going to" is certainly comon in casual conversation, but in any formal situation and any written context (other than a faithful transcription of casual speech), "gonna" is substandard. I'm not sure if it should be called dialect, or slang, or just sloppy speech, but when I read the original question,
I'm leaving on 20th August. I'm gonna leave on 20th August. Would you feel that there is any difference? my first reaction was "Well, 'I'm leaving' is fine. 'I'm gonna leave' might sound all right in conversation, depending on the situation, but it looks terrible in print.
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ok Emotion: wink
Would like to remind you of the "I'm coming" question Emotion: smile

Just to make sure this is not forgotten

I'm coming means that you will soon leave your current location and go there.
Mister MicawberI'm about to come
It's a pity for me I've never had a chance to hear this phrase personally.

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Isnt it ambiguous?

Can't it mean both?
(Forgot to log in again-- perhaps I should just change my screen name to Anonymous-- MM)

It is a very general statement, GT, but when an ambiguous statement includes nuances that are sexual, scatological or bigoted, for instance, it should be avoided like the plague unless one intends to offend or stimulate.
I'm not refering to this I'M about to c0ome thing.
I mean I'm coming. It can be both future and present progressive.
So, does it depend on the situation whats it means?
But what does it mean in the context I gave a couple of posts before?
Again, it's a difference if he is already coming and will arrive in some seconds or if he hasn't even started because he means : I'm going to come.

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