if you work harder,i think you will get better grades.这句话对吗?

if you work harder,i think you will get better grades.这句话对吗? The harder you work,the better grades you will get. If you work hard,you will get better grades.同义句 If you work harder ,you will get better r---in your lessons If you study harder,you will get good grades.改为同义句 If you work harder,you will learn English better.(改为同义句) 英语改写句子题You will do better in your lessons if you work harder (if you work hard i think you can do better) If you work harder ,you ’ll do better in English If I were you,I will get up early.这句话对吗?为什么前面用虚拟语气,后面用will the harder you work ,more knowlege you will get The harder you work,the( )(good)result you will get.