My friend asks: What are you doing tomorrow. I say: Going to study. He says: I t

[Matthew Wai]

OK.

 

[Raymott]

How about 'knew'? For example, 'He knew you will play basketball tomorrow'.

No.

 

[Fanoos62]

"No, I thought you were going to play basketball tomorrow. Are you going to?"

What about: 'You would play basketball tomorrow. Would you?'

 

[Rover_KE]

That's wrong.

 

[Matthew Wai]

http://grammar.about.com/od/ab/g/Backshift.htm
After reading the above, I think backshift is obligatory rather than optional in the subordinate clause after such verbs as 'know', 'think', 'realize', 'imagine', 'envision', 'remember' and 'forget'.

Am I right or wrong? Not a teacher.

 

[teechar]

What about: 'You would play basketball tomorrow. Would you?'

Provided it's punctuated correctly, I don't see anything wrong with that (e.g. to indicate surprise).

You would play basketball tomorrow, would you?