use it
| it is simple: use it to talk about a fact in the future, something that is certain |
The sun will rise at 7 am. She'll leave in the afternoon. They'll arrive in the evening. |
| also: as a sort of promise (I want to do that) |
I'll help you with your homework It is cold. I'll close the window. |
| for a future prediction (what you expect to happen then) you may use simple future or going to |
It will rain tomorrow. It's going to rain tomorrow |
