Lisanne That is perfectly fine, but is a little "clumsy" because the verb is being repeated. To reduce this they would say "they're going to go' or 'they're going to the supermarket tomorrow' - in 'they're going to the supermarket tomorrow' the future is indicated by the word 'tomorrow'. if 'tomorrow' wasn't in the sentence you would have to say 'going to go' to indicate future. As for Benoit's advice, 'plan to go' is ok, but 'going to go' is stronger/more definite. Hope this helps. Good luck with your studies. Len

Hi Lisanne, The form "going to (do something)" is normally used when talking about a plan and usually you mention a time or date in the future, in this case, tomorrow. "Will do something" is more often used for an intention, but not sure when exactly. "Shall" is only used when referring to "I" or "we". Regards, Simon.

Yes, it is correct. It looks a bit strange and repetitious when it's written down in full, but in fact when we say this phrase it sounds fine. In natural spoken English you'd hear something like 'They're g'na go to the supermarket', and it doesn't sound awkward at all. Try it and see. As for your alternatives, yes, you could say them, but the meanings would be somewhat different. As I'm sure you know, we have many ways of expressing the future, all with slightly different nuances of meaning.

going to go this is the same verb but you can plan to go, shall to ...