You are coming to my house

[Duda]

Test No. incompl/elem-10 "Present Tense", question 9

Next time you ......... to my house, you must bring that book.

(a) come
(b) is coming
(c) are coming

Test No. incompl/elem-10 "Present Tense", answer 9

Next time you come to my house, you must bring that book.

Correct answer: (a) come
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Hi,
Why can i say you are coming?
Many thanks for your answer.

[Torsten]

You can use present continuous (you are coming) when you know the time of the event. For example:

I'm glad that you are coming to my house next Friday at 8 pm.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary