求英语语法达人帮助!Having not had enough time for breakfast,(i found

求英语语法达人帮助!
Having not had enough time for breakfast,(i found that) my hurried walk to school was very tiring.为何要加括号里的?
it was not very well 这样讲对吗?
i enjoy to attend jazz concerts 为何要改成 enjoy attending?
travel through 和 travel over的区别
it might seems difficult to believe 为何改成 it might seem difficult to believe

Having not had enough time for breakfast,(i found that) my hurried walk to school was very tiring.为何要加括号里的?
having分词做状语,逻辑主语同后面主语的主语一样,由句子的意思可以知道,主语是i,不是my hurried walk
it was not very well 这样讲对吗?
对
i enjoy to attend jazz concerts 为何要改成 enjoy attending?
enjoy doing sth.固定搭配
travel through 和 travel over的区别
through是穿过（没有高度的差异,如穿过云南,穿过新疆等）,over是穿越（有越过的意思,如越过高山等）
it might seems difficult to believe 为何改成 it might seem difficult to believe
might是may的过去式,用法同may,may + do（原形） sth.

谢谢了