It depends on who studied. You have to provide the subject of the sentence, as well as the subject's gender. For example:
I (masculine) studied for five months = lamadeti chamisha chodashim (למדתי חמישה חודשי×)
you (feminine) studied for five months = lamadet chamisha chodashim (למדת חמישה חודשי×).
"ess-RIM v'cha-MESH" ... "twenty and five"
You say 'Yalda' in Hebrew
Has in Hebrew is: YESH
"Tikra" (תקרה) is how you say ceiling in Hebrew.
"I studied French last year."
Efshar lehodia li eifo yesh malon chamisha kochavim
Five months sraight?? I would say go to the doctor immediatly, there could be something really wrong, if you can't get an immediate appointment, I would even say go to the hospital. You should have gone after a couple of weeks.
"Boyfriend" in Hebrew is "khaver."
Mustache is 'Safam' in Hebrew
Shu'taf is partner in Hebrew
The word "My" in Hebrew is pronounced: "Sheli"
Ken and in Hebrew כן