I would like to learn how to use better English expressions(9)

A few days ago, before, he had called and advised me why you I was studying like that; and that you had One has to face the reality and properly be better to prepared for the exam. So I wondered why he had suddenly changed his reaction to it. I didn’t notice his action at that time. I Just  wondered why he had done like that wondering at his action. Why did he the suddenly praise? me instead of advising me to concentrate on my studies? Not his mode of operation in not admonishing me to study harder. After this call, the last one another came. It was on the very one that This time, he said that he would come over because as we hadn’t have not seen each other for a while.

I would like to learn how to use better English expressions, so I hope you can help correct errors in my writing.