Shanghai _______ (be) a small town hundreds of years ago.
Now it ______ (become) a large city.
第一空应是was,第二空应该是becomes还是has become？又或者两者都可以？盼望专家老师解惑。上一次学生打错字了，请见谅。
There can't have been so many people in the street so late at night.There can't be so many people in the street so late at night.请问此例句中，用 have been 和 be 句意上有什么不同？ 常态的事件不应该用一般时态吗？
...s ill that day. Otherwise I would have taken part in the
discussion.I have been ill, otherwise I
should have written you sooner.以上两句话分别出自赵俊英的语法书，为何一个用了句号一个用了逗号？otherwise到底是是副词，还是并列连词？
...冰英语惯用法词典》p.847-848）
A gold mine was reported to have been found in the in that area据报道，在那个地区发现了一处金矿。（摘自《薄冰英语惯用法词典》p.848）
The storm is reported to have killed five people. 据说这场暴风雨已经造成5人死...
If you hadn't been more careful, you
might have been knocked down by a car.学生老是做这种填空题时，老是反应不过来，老填didn’t，我这种病该怎么治，学生总是到才发现句子后面是有have的，也知道这是加了might的过去完成时，回头一想好像也...
...语气，第54课《黏糊的手指》课文中出现了nothing could
have been more annoying，用到了could have对过去的虚拟语气。两篇短文都是在叙述过去，为什么前者使用could be对现在的虚拟语气，而后者却使用了could have been对过去的虚拟语气？这...
to change or behave in a particular way as a result of or in response to sth这里的of or拆分开，就是下面2句话吗？to change or behave in a particular way as a result of sthto change or behave in a particular way or in response to sth
All substances, ( ), liquid
or solid, are made up of atoms.A. be they gasesB. whether they are gasesC. they are gasesD. they can be gases答案是A，我翻了语法书大概知道了选A的原因，但是我不太懂B错在哪里？通过查资料知道有图片上这三种情况：请问如果是...