求大虾帮帮忙,很急啊在此先谢过了

求大虾帮帮忙,很急啊在此先谢过了
下面这段话中涉及到哪些语法知识,例如是否有从句之类的（但不局限于此）Suddenly I wanted to write about that,about the warmth and good felling of it,but I wanted to put it down simply for my own joy,not for Mr.Fleagle .It was a moment I wanted to recapture and hold for myself.I wanted to relive the pleasure of that evening.To write it as I wanted,however,would violate all the rules of formal composition I'd learned in school,and Mr.Fleagle would surely give it a failing grade.Never mind.I would write something else for Mr.Fleagle after I had written this thing for myself.