over the course of month 和 over a month 有什么区别?

over the course of month 和 over a month 有什么区别? over the course of a year . over the month,over the decades 是什么 意思 有The next month这个单词吗,和 next month有什么区别 half 和 half a month有什么区别？ Over the course of the day 有没有By the month of 它和By the end of month ,during the month o All of the world 和 All over the world 有什么区别? Over a month ______(pass)since we come here. over the years和through the years有什么区别 over the ground和on the ground有什么区别 take over 和 hand over...to有什么区别?