Hello there, I would say that "shall" would be used in the most formal occasions (and possibly more in the U.K.). We, in the USA, usually use "will" for everything. Hope that helps you a bit! Keep on learning! Regards, David

The first sentence is strange. We would never usually say this in modern English. Here's the grammar: In a straightforward simple future tense, you can use 'shall' for the first person singular and plural. For example, you can say 'I shall be in Vegas next week' or 'We shall be in Vegas next week'. If the subject is the third person, 'Peter', you would need to use 'will' : 'Peter will be in Vegas'. It is incorrect to use 'shall' for for the third person to talk about schedules and plans, for example. In modern English, the only time that 'shall' can be used for a third person is in formal written contexts which set out instructions, laws, rules and regulations. This is all that is left of an emphatic form which existed in former times. Please note the following. 1. 'Shall' is NOT just a formal alternative to 'will' . This is a common misconception, particularly among younger speakers of American English. Ignore anyone who tells you that the two are interchangeable, or that 'shall' is just a way of sounding fancy. 2. 'Shall' CANNOT be used in everyday English in the third person to mean e.g. 'I want Peter to go to Vegas'. This form has not existed for about a hundred years, but I believe it's still in some grammar books, particularly in Asia. Ignore anyone who tells you that this is still true. I hope that helps.

Hi there, There is a grammar rule (though it is seldom adhered to strictly nowadays). When we are writing to refer to ourselves (first person : I), we use "shall". Example: I shall be in Vegas next week. When we are writing to refer to others (second person: you / third person: Peter), we use "will". Example: Peter will be in Vegas next week. However, we also see people saying: I will fly to Vegas next week. The distinction is not strictly observed nowadays. Hope this helps. Cheers, Lance