有两个句型一直不明白,关于it 和it is有两个句型一直不明白：1.He found it difficult to climb the stairs.2.He thinks that it is better to see the movie than to read the book in original.为什么第一个是it而第二个是it is?

有两个句型一直不明白,关于it 和it is有两个句型一直不明白：1.He found it difficult to climb the stairs.2.He thinks that it is better to see the movie than to read the book in original.为什么第一个是it而第二个是it is? 句型It seems, 和It appears that,有何异同? 我一直不明白pick it up这类的词组和pick it up,有什么区别,分别用在什么句子中? 单选 it is 30 years ____we last met.句型it is ……since 和it is~before 这两个句型怎么区分 it is ashamed/shameful 两种用法都可以嘛?有什么区别?it is 句型，两个都有 是不是？ It's friendly____hands when we meet othersA.shake B.to shake C.shaking D.shoot我觉得B和C都可以,因为有It's adj to do sth和It's adj doing sth这两个句型,.. 关于it is said that我看到有这两个句型：it is said that...it has been said that...我想问1.这两个句型有什么区别吗?也就是说 会因时态不同 而使用范围也不同吗?2.从句的时态有规定吗?我看到的例句从 用look和appear造句look和appear,用这两个单词分别造句句型是It is...to...句型是It is.....look/appear.....to... it is adj to do 和it is adj do一样吗?有没有it is adj do?好像是两个句型的结构上不同把?解释一下啊! 常用句型it can be hard to do...和it is hard to do 有何区别?两个都是啥意思?在意思上是否一样?it can hard 行么?为何家be hard是啥词性? there is与 It's 有什么固定句型 一直不知道表示可能性的词possible之类的词应该用哪个帮忙总结一点这两个句式后经常接的词 关于it is句型的问题it is pleasant lying in the sun 与it is pleasant to lying in the sun有何区别? marginal costing 和 absorption costing有什么区别一直弄不明白这两个 最好有例题说明 有it is time for sb.doing sth.和it is time for doing sth.这个句型吗?为什么? how do you find it 和 what do you find it 哪个句型正确有什么区别 强调句型有it is ...when 强调句型有it is ...when it is ...where it is ...who 这3种句型吗? 资本主义萌芽和民族资本主义到底什么区别啊 .搞不懂 .一直闹不明白这两个有什么区别 .. 有一个关于两个英语题的疑问1.Do you have any idea ____computer plays such an important part in our daily lifeA、that it is that B、what it is that C、how it is that D、when it is that可是与特殊疑问句的强调句型矛盾：被