WILL is the most common way of expressing future time
What will you do tomorrow?
What will you do next week?
I will see my friend tomorrow.
I will go to England next week.
To make the future less certain you can add the word "probably":
I will probably see my friend tomorrow.
I will probably go to England next week.
The short form of WILL is LL
The short form of WILL NOT is WON’T which sounds awfully similar to WANT, just a little longer.
Don’t worry, context takes care of everything, no one will get confused.
Future with BE GOING TO
I am going to see my friend tomorrow
I will see my friend tomorrow
What is the difference?
Don’t worry about that. You won’t have time to think about that next time you try to make a sentence about the future. They basically mean the same thing, both sentences are about the future.
It is not going to rain tomorrow
It won’t rain tomorrow.
There are other ways of expressing the future:
-- I will see my friend tomorrow (will)
-- I am going to see my friend tomorrow (be going to)
-- I will be seeing my friend tomorrow (future progressive)
-- I am seeing my friend tomorrow (present progressive)
The thing is, in a real face-to-face conversation, you won’t have time to choose among the 4 therefore, the first grammar you need to master is Future Simple with WILL.
Remember the WILL
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