simple present

[eseslami]

In some texts, I saw sentence like this "Are you going to study English tomorrow?" But answer was "yes,I plan to study English tomorrow."
The answer isn't in future but in simple present,why? simple present is used with "tomorrow". May i know why? and when this way of writing is correct?

 

[Raymott]

The simple present is often used to refer to a future event. "I leave for Sydney on Thursday".
But in neither of your sentences does the present refer to the future.
The sentence means "I plan [now] to study tomorrow", not "Tomorrow, I'm going to plan to study".

 

[emsr2d2]

[STRIKE][/STRIKE]

In [STRIKE]some texts[/STRIKE] a text, I saw the sentence [STRIKE]like this[/STRIKE] "Are you going to study English tomorrow?" [STRIKE]But[/STRIKE] The answer was "Yes, (space required after a comma) I plan to study English tomorrow."
The answer isn't in the future but is in the simple present. Why is the simple present [STRIKE]is[/STRIKE] used with "tomorrow"? [STRIKE]May i know why?[/STRIKE] [STRIKE]and[/STRIKE] When is this way of writing [STRIKE]is[/STRIKE] correct?

The simple present is used because it refers to the current plan. By definition, plans refer to what you might do in the future. It doesn't matter how far in the future.

I plan to eat dinner at 6pm today.
I plan to go on holiday in February.
I plan to own a mansion by 2025.

Please see my corrections above, marked in red.

 

[eseslami]

It's very kind of you to explain and note every things.I don't know if i could write correctly in future.