 Some of the more common usages for the future continuous tense are as follows We can use them to speak about actions in progress at a future time such as I'll be having lunch at 2 p.m We can use it to predict the present Because we're predicting we wouldn't often predict something about ourselves So perhaps somebody has asked about a gentleman John and his whereabouts You're not sure about his whereabouts, but you're going to predict it and you use the future form I think John will be having lunch now We can also use it for polite inquiries is particularly where we don't want to influence the outcome There are other ways to ask things But if we need to get the most accurate answer without influencing it We could put it in a very polite form such as will you be coming to the party?