1. It is necessary that…有必要……
2. It is general1y considered that…人们普遍认为
5. It is asserted that…有人主张……
6. Its wings can help it fly.
7. It 是主语就是隐含的"它"的意思,它9点了,当我们走的时候,is 是谓语,9o'clock是宾语,when I went home是状语从句
8. it is important for sb to do： 对某人来说做某事重要
9. it is a long story：说来话长；一言难尽
11. It is good news that………是好消息
12. It is considered that：据知
13. It's my book,not yours.
14. It's hard for me to read this notice.
15. It turned out that…结果是……
16. it is obvious that：显然…
17. It is supposed that…据推测……
18. It follows that…由此可见……
19. It is 是形式主语,真正的主语是you 谓语是give,me和hand是宾语,me是间接宾语,hand是直接宾语.It is 是形式主语,不是真正的主语,英语中常用这种表达方式,防止头重脚轻.
20. It's good to be a better man.
21. it is common knowledge………是常识
22. it is certain that：毫无疑问……；肯定……
23. It must be pointed out that…必须指出……
24. It must be admitted that…必须承认……
25. It is a pity that：遗憾的是
26. It is a question that………是个问题
27. It is clear that…很清楚……
28. it is reported that：据报道
30. It is no use doing： 做........是没用的
31. It is important that ...： 重要的是
32. It is said that：据说；有人说；据说……
33. "It’s time to do sth."表示"是做某事的时候了"。此句常与上句替换使用。
34. it is asserted that：有人断言；有人主张
35. It is learned that据悉…；众所周知
36. it is assumed that：假定；人们认为；据推测
37. It is 开头的句子做的是形式主语,真正的主语是you 谓语是give,me和hand是宾语,me是间接宾语,hand是直接宾语.It is 是形式主语,不是真正的主语,英语中常用这种表达方式,防止头重脚轻.
