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Are you going to be sick if you eat that? This clause "are you going to" is a future prediction so shouldn't it be better to use will

Is going to used as the event "being sick" is about to happen very soon this sentence was alone no context it is an example

http://www.grammar.cl/Notes/Going_To.htm

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    "get sick" would be better than "be sick". Since you aren't sick yet, your statement involves a (possible) change of state, not a static state.
    – user3169
    Jul 31, 2018 at 20:59
  • @user3169 "be sick" means to throw up in BrE. So, the OP's sentence is fine.
    – Lambie
    Jan 22 at 15:17

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Usually 'to be going to' and 'will' are directly interchangeable, but there are times when they are not.

In your example, the are interchangeable.

In the following example the are not interchangeable:

I am going to France for my holiday.

You cannot replace 'going to' with 'will' in that sentence.

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  • @James The reason that you cannot replace going to with will in the sentence you give is because the former is used to mean travelling to and it's not followed by a verb as in going to see (where going to is used to introduce the main verb rather than acting as the main verb itself.). Jul 31, 2018 at 16:47
  • @userr2684291 Will you be sick if you eat that? and Are you going to be sick if you eat that? are perfectly acceptable. I was commenting on the sentence in the question, not the new example in the answer. (Which is an exception, and makes a specific point.) And, yes, I do say, variously, it looks like it will rain and it looks like it's going to rain. As well as It's going to rain and it will rain. Within each pair, they mean effectively the same thing. Jul 31, 2018 at 18:57
  • @Ronald Sole I agree with your comment. I was simply trying to ensure that the OP was aware that 'going to' cannot always be replaced by 'will', and I used the first example that came to mind in the late hours of the evening.
    – James
    Aug 1, 2018 at 7:07
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It is natural to use "going to" in this context.

One sense of the "going to" future is to talk about future events that occur as a result or consequence of current conditions. So if you are asking "Do the current conditions of nausea indicate that you are likely to be sick in the future?", you would ask "are you going to be sick".

"Will" is a fairly neutral future tense, but it sometimes is used to suggest "future events that occur as a result of your choice". So "will you be sick" seems less likely, as it has shades of "is it your choice to be sick in the future".

Grammatically both are correct, and there isn't much difference. But I suspect most native speakers would instinctively choose "Are you going to be sick" more often that "Will you be sick", for this reason.

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