英语to be done 和to 1.It took a long time for the effective use of natural gas to be made.2.The book is easy to read.……于是我就混乱了 什么情况用to be done 什么时候用to do呢
问题描述：
英语to be done 和to
1.It took a long time for the effective use of natural gas to be made.
2.The book is easy to read.
……于是我就混乱了 什么情况用to be done 什么时候用to do呢
答
第二个带有主动表被动的意味,比如：the cloth is easy to sell,这个衣服卖的很好.the cloth is easy to be sold衣服很好卖