English.Web Tenses

Present Simple for Future: Use
< Form

To talk about TIMETABLES: departures and arrivals of trains, boats and planes - and the passengers; also schedules of other types:

My flight for France leaves at 10am next Saturday.
I leave at 10 on Saturday.
We arrive in Paris at 11.30.
The conference starts at 11.00 next Monday.

Sometimes the idea of a sentence is future, but you must use the present tense after CERTAIN WORDS

When she arrives, she'll tell us all the news.
As soon as they get here, we'll start the presentation.
You must keep trying until you win!
Don't start before I tell you.
If it works, I'll let you know.

I leave

Compare with the future for someone with a ticket.

Both are possible...

CERTAIN WORDS

After certain words the future idea is expressed with a present tense...

but not only the Present Simple.

...when you see her
while you are working
until you have learned all the grammar
when you have been working here for 10 years

she arrives

...after "When..."

they get

...after "as soon as..."

you win

...after "until..."

I tell

...after "before..."

it works

...after "If..."

Present Simple for Future: Use < Form

Present Simple for Future: Use
< Form