我找到两种说法，一是时态不变,例句：Scientists discovered that DNA holds the code for life.一是时态可变可不变，例句Copernicus proved that the earth goes/went round the sun.请问如何理解这两个句子？
However, no feathers were ruffled by this departure from tradition - as
the audience that gathered to listen to the concert last week was in fact a
couple of thousand chickens.想问一下各位朋友如何理解“feathers”这个词，后面说“听众实际上是几千只鸡”，在这里是...
...知识与重难点讲解》高中英语第二册认为在set an example后的介词要用 to，不能用 for。实际上，这里的 example后面接 to 或者 for 都是正确的用法，只不过是后接 to 比后接 for 的用法更加常见而已。例如：You must set a good example to the ch...
曹老师曾在答复网友的问题中提到过章振邦先生的《新编高级英语语法》，于是从首图借来学习。其中主谓一致一章第68页，讲到当主语为”what kind of+名词”时，给出了两个例句：What kinds of cherry tree flourish best in this region?What kin...
BBC上有一篇文章中的两句话不太明白：1. Why did you agree to having decaff coffee in the kitchen when I know you don't like it… and neither do I!请问：为什么不是agree to have？2. Well, we'll find out later on in the show if that's right or not. 今天在学...
...way to learn English is to live in an English-speaking country.但陈老师的解答中却有这样一个例句：Try to find your own way to express the idea. 尽量用你自己的语言表达这个意见。感觉这个例句中的 way 前面用了物主代词，但后面用了不定式。请专家...
...《15篇文章贯通四级词汇(星火英语)》时发现一处不理解的地方，Maybe an automatic recorder would be placed when food is removed from a refrigerator。这里的recorder似乎改为order合适，而place an order 正为下订单之意。原文如下：Food might not be ...
...Water is__________________________________.1) 我认为会用到有关vital的短语即： be vital to 和be vital for. 请问这两个短语有何区别？我查到的资料是 "be vital to" refers to something indispensable while "be vital for" implies that the subject is very ...
如果问句是“情态动词+have+pp”，如何回答呢？要不要有have？比如：Should they have arrived by now? ________A. I think they should.B. I think they should have.如何选择？概括一下就是：回答情态动词后接完成式的问句要不要重复have？