...天在书上看到这句话:Finishing the work in an hour is easy for us to do. 但感觉有点怪怪的,后面的to do和前面的finishing好像构不成动宾结构,所以这句话是不是错了呢? 还有如果我改成Finishing the work in an hour is easy for us. 是不是可以呢?
请问以下2个句子有什么区别? 侧重点有什么不一样?But China's satellites are important for improving the NAV system.But China's satellites are important to improve the NAV system.