1. It is bad to....……是不好的.

It is bad to push yourself too hard. Just try your best. 把自己逼得太紧不好.尽力而为就行了.

2. It's hard to imagine...…很难想像…….

It's hard to imagine how he made it without any help. 很难想像没有人帮助,他是怎样成功的.

3. It is believed that...…人们认为…….

It is believed that what she said is true. 大家相信她的话是真的.

4. It didn't /won't take long before... 没多久坏需要多久……就…….

It didn't take long before he got used to life abroad. 没多久他就适应了国外的生活.

5. It is easier to... than to.......比.....容易.

It is easier to buy a car than to keep one. 买车容易养车难.

6. It is easy enough to...……相当容易.

It is easy enough to copy and paste; but you should write something by yourself.
抄袭(复制十粘贴)非常容易,但是你应该自己写一些东西.

7.It is essential that... 有必要……. [主语从句使用虚拟语气]

It is essential that effective measures be taken to protect our civil rights.
有必要采取有效的措施来保障我们的公民权利.

8. It is good manners to do...……是有礼貌的表现.

It is good manners to bring along a small gift or some flowers when you are invited to dinner by a foreign friend.
如果外国友人邀请你共进晚餐,去的时候带上一份小礼物或者鲜花是有礼貌的表现.

9. It is high time ... 现在是……的时候了./早就应该……了. [从句使用虚拟语气]

It is high time we stopped talking about this silly question.
我们早就该结束讨论这个愚蠢的问题了.

10. It is hoped that... 希望…….

It is hoped that no one was seriously injured in the car crash.
希望在这场车祸中没有人受重伤.