双语例句：
1、The present regime has been in power for two years.
现政权已经执政两年了。
2、There has been a lot of resistance to this new law.
这项新的`法规已经遇到很多的抵制。
3、She has been to China.
她去过中国。
4、Only time will tell if the treatment has been successful.
只有时间才能证明这种疗法是否成功。
5、The software we use has been modified for us.
我们使用的软件已按我们的需要作过修改。