To study hard does good to your future.请问两个TO在这个句子中的用处是什么?To study hard是不定式还是To study?

To study hard does good to your future.请问两个TO在这个句子中的用处是什么?To study hard是不定式还是To study? how to study hard? How to study hard? i hard to study english I need to study hard 对 study hard 提问 Tony doesn't study hard He often （let）his father down Who does this watch（belong）to does she study hard at school 改为ing形式 l have to Study hard (一般疑问句) It's hard to study English. you shouid study hard to ------ your english It is hard to study English g______well. it is time to study hard! I wish you to study hard . stop talking .he is (hard) to study -Lily has made a decision to study hard.-___-Lily has made a decision to study hard.-_____.A.so has heB.so have sheC.so she hasD.so she does study hard He____(study) English very hard!答案为什么是studies,而不是does study? study hard and you will learn English well一句中开头为什么不能是to study hard