Please help me.

Can I use the future tense in this sentence? Please explain if it is not. Thanks.

"What are you waiting for?

I am waiting for the shop open.

But it doesn't open/will not open till 9.00.
It is fine to say either.
I am waiting for the shop to open
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I don't think so you can usse future because generally present simple it is used

when we are talking about timetables .

A present tense is used to refer to a future event whic is timetable. In this sentence, the time is 9:00, so you can use the present tense.
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 Marius Hancu's reply was promoted to an answer.