Question

Can someone explain the difference between forming future, conditional, and imperfect? (In french)

Answer 1

Future formation is INFINTIV(E) + future ending
endings are :
-ai
-as
-a
-ons
-ez
-ont

verbs ending in -RE will lose the E at the end:
prendre -> je prendrai
minor orthographical changes (double consonants or accents) due to pronunciation may occur:
jeter -> je jetterai
appeler -> j'appellerai

Some irregular verbs, among which:
être -> je serai
avoir -> j'aurai
aller -> j'irai
faire -> je ferai
voir -> je verrai

Conditional is exactly the same, including irregularities, using sllightly different endings:
-ais
-ais
-ait
-ions
-iez
-aient

The reason imperfect is mentioned is probably because these endings are the same as the endings used with imperfect. You could say that the conditional is a sort of "imperfect form" of the future.

Answer 2

To check the conjugation of any verb, use:
http://www.bescherelle.com/conjugueur.php