...话：在夸克大全 18.35 Extraposition of a clausal object中写道：When the object is an -ing clause in SVOC and SVOA clause types, it can
undergo extraposition; when it is a to-infinitive clause or a that-clause, it
must do so我的疑问：只见过SVOC句型有形式宾语it的情况，没...
...nce
in her life. While
Herbert was walking fast to try to get to school on time, an elderly gentleman
stopped her, and asked Herbert to tie his shoelaces for him. At first she was a
bit hesitant but then she saw that the old man was unable to use his hands
properly and had a walking stick. She reali...
...，请指教！
1. He had travelled only seven
miles across the Channel when his engine failed .......
2. A week before, he had completed a successful overland flight during
which he covered twenty-six miles.
3. His great flight lasted thirty-seven
minutes.
以上3句话里，黑体部分动词...
The output of cotton was 400% (=4 times) greater than in 1973. 大三倍，是四倍The output of cotton in 1979 was five times greater than that in 1973. 大四倍，是五倍There was a 400% increase in the output of cotton between 1973 and 1979.这句话表示纯粹的增长，大四倍，是五...
请问下面句子中的 endangered animals 可以换成 endangering animals 吗？Endangered animals, such as pandas, also live in the valley.我的理解是：过去分词表示完成吧！这里的 endangered animals 是指频临灭绝的动物吧，说明是即将灭绝的动物，或是正在...
Gravitational waves—ripples in the geometry of space-time—are analogous to electromagnetic waves. The challenge in trying to observe these waves directly is that they are extremely weak. To make waves large enough to be detectable, the most voilent events in the universe are required: supernova ...