To pass the mid-term exam,he studied very hard.开头为什么不可以用Pass

To pass the mid-term exam,he studied very hard.开头为什么不可以用Pass he studied very hard( )he could pass the exam ------can pass the mid-term exam ______can pass the mid-term exam She studied hard to pass the final exam. She studied hard in order to pass the exam She studied hard she studied hard in order to pass the exam =she studied hard How finds it very hard to pass the exam.(改为同义句) He finds ___ He works hard __________ (pass) the exam. she studied hard in order to pass the exam,怎么改为同义句 He is ( )enough to pass the exam. He studies hard.He pass the exam.（合并成一句）