a.try(not) to do...b.why don’t you =why not?c.I think ,you s

a。I try to overcome the trouble/change myself/be a good student。我试图 克服困难/改变自己/成为一名好学生。b。Why not come here/go to school/write to me?（你）为什么不 过来/去上学/写信给我?c。I think,you should wok hard /get up early/apply to me。我认为你应该努力学习/早起/向我道歉。