...。如果是介词,后面好像就不应该跟介词,而是副词时就可以。牛津的例句:The papers were strewn about the room(这里后面没有跟in the room)Her books were lying about on the floor.(这里后面没有跟the floor)
...案是could have come请问老师在这里如果只有(come)一个词是否可以填 had come? 这样的话整句句子与使用情态动词could have come意思上有区别吗?还有个疑问,以前学过“与过去事实相反的结构”是主句would/could/should/might have done, 从句had ...
Still, there is a lot of work to be done in the area of transplanting the printed cells. 老师,这里的to be done, 为什么不可以是to do的形式,我的理解是work后面省略了for us ?请老师帮忙看看问题在哪里?
...词作主语时,在表示比较抽象的一般行为和动作时,二者可以互换,如:To climb mountains is a good form of exercise= Climbing mountains is a
good form of exercise.但为什么下面这个句子不能用To understand作主语呢?谢谢Understanding your own needs and style...