为你解答.
1、You must do it like the teacher told you, or you may make a few mistakes.
你必须按老师说的去做,不然可能会犯错的.
解释：应该把like改为as,like只能接短语,而这里从句要用as来引导.
2、The old man kept on ask the same questions.
这位老人反复问着同一个问题.
解释：keep on doing,反复做某事,动词ask应该改为asking.