Why don't you take a day off so that you recover properly / will / shall recover

[Jesusengland]

Hello.

What is the difference in meaning? I can't understand when I have to use So That with An ordinary verb, Will and Shall.

-Why don't you take a day off so that you recover properly / will/ shall recover properly?.

Thanks.

[Barb_D]

Actually, my choice would be: ...so that you CAN recover properly.