We do not use to say what somebody has already arranged or decided to do in the future:
Ann is working next week. (not Ann will work)
Are you going to watch television tonight? (not Will you watch)
For “is working” and “Are you going to …?”
But often, when we talk about the future, we are not talking about what somebody has decided to do.
Joe and Tom are waiting in line at a movie theater.
Tom : This is very long lone!
Joe : Don’t worry. We’ll get in.
We’ll get in does not mean “we have decided to get in.”
Joe is saying what the knowns or thinks will happen.
He is predicting the future.
When we predict a future happening or situation, we use will/won’t.
Some more examples:
Jill has lived abroad for a long time. When she comes back, she’ll find a lot of change here.
“Where will you be this time next year?” “I’ll be in Japan.”
That plate is hot. If you touch it, you’ll burn yourself.
Tom won’t pass the exam. He hasn’t studied hard enough.
When will you find out how you did on the exam?
We often use will (‘ll) with :
|probably||I’ll probably be home last tonight.|
|I expect||I expect the test will take two hours.|
|I’m sure||Don’t worry about the exam. I’m sure you’ll pass.|
|I think||Do you think Sarah will like the present we bought her?|
|I don’t think||I don’t think the exam will be very difficult.|
|I guess||I guess your parents will be tired after their trip.|
|I suppose||When do you suppose Jan and Mark will get married?|
|I doubt||I doubt you’ll need a heavy coat in Las Vegas. It’s usually warm there.|
|I wonder||I worry about those people who lost their jobs. I wonder what will happen them.|
After I hope, we generally use the present:
I hope Kate passes the exam.
I hope it doesn’t rain tomorrow.