the present tence is: he is happy because he win..... Είναι χαρούμενος επειδή κερδίζει.
Why are we learning the past tense of this verb when we haven't learned the present tense yet?
Um, not sure where you found this sentence, but Past 1 is after Present 1, 2 , and 3. Where did you find this?
I found this sentence indeed in the Past 1 module. I can't remember learning the verb 'to win' in the Present 1, 2 or 3.