It's three weeks since we ____him.___为什么不能用have seen 而用了have been seen 为什么?
问题描述:
It's three weeks since we ____him.___为什么不能用have seen 而用了have been seen 为什么?
三周了自从我们 见他.have seen 不也是现在完成时么 been 不是be的过去式表示曾经经历,我们要加进去?
答
都不对,应该是saw
我们已经是三个礼拜没见到他了一般过去式? 请问怎么看出的1. It is 。。。 since..(从句用一般过去时). 自从。。。以来已经很久了 2. It is ages since we last met. 我们已经好久没见面了。 3. It is three years since he graduated. 他毕业三年了。 4. It is ten years since she graduated from school.. 她已经毕业10年了。 5. It is six years since he left. 自从他离开以来已经是六年了。【希望帮助到你,若有疑问,可以追问~~~祝你学习进步,更上一层楼!(*^__^*)】