Language / Future conditional (converting some sentences into conditional form with "gdyby") [5]

Hello!
I would like to ask for some help.... I heard that in Polish there's no plus for future conditional. My task is to convert these sentences into conditional form with gdyby and I don't know what to do with future sentences.

ex.
Jeśli będę się uczyć, na pewno zdam egzamin.
Gdybym................., na pewno zdałam (zdam?) egzamin.

or

Jeśli Kasia będzie więcej pracować, będzie więcej zarabiać.
Gdyby Kasia ......................, ........................ ??

What happens to będzie? Does it disappear?

I would be very grateful and happy if you could help me :) Thanks a lot in advance... :)

Language / 'much better' expression in Polish? [8]

How do you say it in Polish?
The word "much" confuses me in this expression... much better, much more interesting, much nicer, much smaller...

Language / Jestem za [11]

Can I use this expression in everyday situations, when I want to say that I line up with my partner?
Because I found it in a dictionary, and it said: "Jestem za" - "I agree". Do you use it often in Poland or should I use an other expression?