Question

you should study hard. you will pass the exam.直接

语变间接引语

Answer 1

楼上几个回答都不是间接引语，
实际上间接引语大都是宾语从句，当直接引语为祈使句，陈述句，疑问句被转换成间接引语时，句子的结构，人称，时态，时间，时间状语和地点状语等都要发生改变。间接引语其实就是我们所说的第三人称转述。
所以，楼主你的问题问的也不对。你的问题前边是不是还有He said之类的？如果原句是这样：He said :“ you should study hard.You will pass the exam.”变直接就是：He said that I should study hard and I would pass the exam

Answer 2

you should study hard so that you can pass the exam

Answer 3

He said that he should study hard.
He said that he would pass the exam

Answer 4

You will pass the exam if you study hard.

Answer 5

The teacher says I will past the exam if I study hard.