Only one (1) expresses Future tense! (2) and (3) introduce the 'gerund versus infinitive' issue. To understand the differences, you need to be very VERY clear on the uses of the Present Tense, and Present Continuous.
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lucas21c# 1 is for sure "future".
1. The president Barack Obama will make a statement tomorrow.
2. The president Barack Obama is making a statement tomorrow.
3. The president Barack Obama is to make a statement tomorrow.
TerryxpressWhy not, "The Eagles come to the Bay Area next month..."Uh Terry,
Terryxpress"The Eagles will be coming
Terryxpress...was it the same professor who told you:
"The president Barack Obama will make a statement tomorrow."
This isn't a planed event ...
...or just YOUR understanding?!
Not planned by whom? Certainly, Obama plans to: "He WILL make a statement"...or some White House misinform