‘will/shall + infinitive’
- We use the future simple to express a promise.
They will allow you to go through.
He shall be present tomorrow at the meeting.
I will do my best.
- We use the future simple to express a prediction about the future.
His birthday will bring much happiness to the people.
Next year will be a great surprise.
I don’t know what will happen if doesn’t succeed.
- We use the future simple to express a voluntary action, usually it is used for a spontaneous decision right in the moment as we’re making it.
Can you help me please? Yes, I will help you right this instant.
Could you send me the check please? Yes, I will send send it now.
He shall prepare your lunch sir.
He will make the order.
Note: There are many similarites between ‘will’ and the ‘be going to’ form. For instance both can mean ‘an intention’, or ‘a prediction’.
‘I am going on vacation in March’. or ‘I will go on vacation in March’.
‘I think this man is going to be the next president’. or ‘I think this man will be the next president’.