been的用法和意思
been的用法和意思：been是be的过去分词，作为动词，中文亩岩含义为“是”。been用在完成时和被动句中，其饥肆中现在完成时的构成为has/have+been/done，过去完成时的构成为had+been/done,当被动句的主语是物时，即用被动语态。
been的中文含义及用法介绍
been：英式读音为[biːn]，美式读音为[bɪn]。
been是be的过去分词，中文意思为“是”，用于完成时，表示“已经过去”。例句有：
1、Scientists think that there has been life on Earth for millions of years.
科学家认为生命存在于地球已经有几百万年了。
2、They have been playing football for 3 hours.
他们已经踢了3小时的足球了。
3、I have been away from Paris for two weeks.
我离开巴黎已经两星期了。
4、There have been many changes in recent years.
近几年发生了许多变化。
5、We had to work within the parameters that had already been established.
我们必须在已设定的范围内工作。
6、The resources at our disposal could have been better utilized.
我们所掌握的资源本来可以利用得更好，获得更高的效益。
7、A new satellite has been put into orbit around the earth.
一颗新的人造卫星被送上了环绕地球的轨道。
8、The first part of the plan has been safely accomplished.
计划的第一部分已顺利完成。
9、The new drug has not yet been licensed in the US.
这种新烂耐轿药尚未在美国获得许可。
10、The theory has been superseded by more recent research.
这一理论已为新近的研究所取代。
