if i were you and my behaviour could decide(influence) whom you are going to be,what am i gong to do now
沒(méi)必要加now（第1個(gè)其實(shí)第2個(gè)也沒(méi)比要）,句意更加通順,加語(yǔ)氣詞could順便表時(shí)態(tài)（因?yàn)楝F(xiàn)實(shí)你并不能影響他）另外我的行為會(huì)影響他可能句意更好更通順,沒(méi)有比要弄個(gè)主語(yǔ)從句）.i will be how to do不是疑問(wèn)句,并且是中式英語(yǔ),完全按字面順序翻譯.
if i were you and what i do could decide who you will be,what am i going to do.(如果用how,就要用how am i going to do it,但是不知道it指代什么,所以最好用what)