YOU SAID:
If he wanted to he would
INTO JAPANESE
彼が望むなら、彼はそうするだろう
BACK INTO ENGLISH
if he wants he will
INTO JAPANESE
彼が望むならそうする
BACK INTO ENGLISH
do if he wants
INTO JAPANESE
彼が望むならする
BACK INTO ENGLISH
do if he wants
That didn't even make that much sense in English.
