when did you come here?____since we landed here.A.it has been two days B.it was two days 选什么?为什么?为什么？
问题描述：
when did you come here?____since we landed here.
A.it has been two days B.it was two days 选什么?为什么?
为什么？
答
我选A
since 是从过去到现在，用完成时。
答
选A
答
答案是A。 记住 since 出现时 一定是完成时态。
自从我什么什么时候我在做某件事。 就算现在不做了。表示的也是那段时间段内 他在做。
答
A.it has been two days
答
A （It is/ has been +一段时间+since +从句（过去时）.固定句型‘自从……以来,……了’）自从我们登陆这里已经两天了.