Conditional sentence: If I ... (know) you weren't going to come tomorrow, I...

[Kidnapper]

Hello,
Have a nice day!
And here is an exercise that makes me very confused ,I need your useful helps:
Put the correct form of the verb to the blank:
1.If I ....(know) you weren't going to come tomorrow ,I ...(not buy) any food.
I don't know what type is this conditional sentence and why it is ''tomorrow'' but not ''the next day''.
Please help me.
Thank you very much

[Yankee]

Hi Kidnapper

In theory, it could be a type 2 conditional:
Type 2: If I knew you weren't going to come tomorrow, I wouldn't buy any food.

Or it could be a type 3 conditional (type 3 is more likely, in my opinion):
Type 3: If I had known you weren't going to come tomorrow, I wouldn't have bought any food.

In either case, the word 'tomorrow' is used because tomorrow is tomorrow at the time the sentence is spoken.

For example:
Let's say today is Friday and tomorrow is Saturday. I went shopping for food at 10 o'clock this morning (Friday). It is now 5 pm on Friday, and you have just said this to me: "I am not going to come tomorrow." (Tomorrow = Saturday) My response could be "If I had known (before I went shopping this morning) that you weren't going to come tomorrow, I wouldn't have bought any food." (Tomorrow = Saturday)
.

[Kidnapper]

But why it is ''you weren't going..'' but not ''are going'' because to the best of my knowledge ,in type 3 conditional ,in IF-clause ,''had V-ed'' is not the past perfect tense ,it is just a form of verb ,so it can be ''are going'' ,can't it? I just think so

[Yankee]