话题 than is necessary

话题 than what is

话题 it is that

话题 is said to

话题 it is hoped

话题 effects+is/are

话题 was/is 时态问题

话题 thisi is true

话题 that is 的用法

话题 fresh is best

话题 this is why...

问题 who is to blame的用法与理解

这句话出自一个选择题：A.who is to blameB.who blamesC.who to be blamesD.who is to be blamedwho is to blame是正确的选项，解析中解释到--不定式作表语时,在某些固定结构中可用主动形式表示被动含义1.这里该怎么理解答案呢？和那个 be to do 要做...

问题 by how quiet it is 的用法

They were struck by how quiet it is here in the evening. how quiet it is做什么成分，这不是感叹句吗，怎么可以用到句子中，是怎么转换的，how还有what的感叹句用在句中应该怎么用？

问题 There is known to be…是一种句型吗

There is known to be a big problem. 这个句子如何理解？There is known to be…可以当作一种句型来看待吗？

问题 football is played=足球被踢？

看到这样一个句子：European football is played in 80 countries, making it the most popular sport in the world. football is played？足球被踢？总感觉得有点怪怪的，这样的表达符合英语习惯吗？谢谢老师解答！