run-on sentences：句語句之間沒有銜接sentence fragments：句子成分缺失dangling modifiers：懸垂結構illogical or faulty parallelism：平行結構不一致unnecessary shifts in point of view：語義切換沒有必要的過...有例子嗎？很想知道清楚一點，加分晚了，明天吧按順序編一個paragraph：
Ciao li is my best friend , he helps me a lot . One day ,having a problem in my homework ,he volunteered to offer help (分詞懸垂結構），so the problem was not only solved but also I knew how to deal with the similar questions(平行結構不對稱）. Good friends can't build up on money ;(on the contrary )語義切換 a friend in need is a friend in deed.