have been与have gone的意义和用法不同,在使用时不能将它们混为一谈下面谈谈它们的区别:1.have been具有“某人去过某地,现在人已回来了”的含义。例如:She has been to Shanghai.(JBⅢ,P121)(她去过上海。)(现在人已不在上海)Bruce is young,but he has been to many foreign countries.(JBⅢ,练习册,P89)(布鲁斯虽然年轻,但他去过许多国家。)
“Body clocks” are biological methods of controling body activities.Every living thing has one. In humans, a body clock controls normal periods of sleeping and waking. It controls the time swhen you are most likely to feel pain.Eating, sleeping and exercising at about the same time each day will help keep body activities normal. But changes in your life, a new job, for example, destroy the balance and thus cause health problems.
have been与have gone的意义和用法不同,在使用时不能将它们混为一谈下面谈谈它们的区别:1.have been具有“某人去过某地,现在人已回来了”的含义。例如:She has been to Shanghai.(JBⅢ,P121)(她去过上海。)(现在人已不在上海)Bruce is young,but he has been to many foreign countries.(JBⅢ,练习册,P89)(布鲁斯虽然年轻,但他去过许多国家。)
Before there were humans, the world changed only slowly. The climate warmed and cooled, new plants and animals developed and became extinct (绝灭的) in their turn, and sea level rose and fell over periods of thousands, if not millions of years. But during the last two thousand years great changes have taken place. Forests have disap-
