1.这个句子的基本结构是 Do sth.or you'll.意思为“做某事,否
则...”eg.Study hard or you 'll fail the exam.
这个句型也可写成“Do sth.and you'll...” 意思为“做某事,你就
会...” eg.Study hard and you'll pass the exam.
2.so that 引导目的状语从句,eg.She got up earlier so that she could catch the first bus.
3.before 引导时间状语从句.
4.词组有：keep doing 一直做某事