句型8
It is suggested / ordered/ commanded /…that +clause.(从句的谓语动词用should do, 但should可以省略。)如： 
It is suggested that the meeting should be put off.有人建议推迟会议。 

句型9
It is/was＋表示地点的名词＋where+从句。（注意本句不是强调句型，而是以where引导的定语从句。）如： 
It was this house where I was born.请比较：It was in this house that I was born.(后一句是强调句型。) 

句型10
It is / was +表示时间的名词＋when+从句。（注意本句型也不是强调句型，而是以when引导的定语从句。）如： 
It was 1999 when he came back from the United States. 请比较：It was in 1999 that he came back from the United States. 

句型11
It is well-known that＋从句。如： 
It is well-known that she is a learned woman.众所周知，她是个知识渊博的妇女。 

句型12
It is +段时间＋since+主语＋did. 请比较： 
It was +段时间＋since+主语＋had done. 如： 
It is five years since he left here.他已经离开这儿五年了。 
It was five years since he left here.（同上）
注意下列句型的翻译:It is five years since he lived here.他从这儿搬走已经有五年了。 

句型13
It +谓语＋段时间＋before+主语＋谓语.（ before引导的是时间状语从句。）　如： 
It wasn't long before the people in that country rose up.没有多久那个国家的人民就起义了。 
It will be three hours before he comes back.三个小时之后他才能回来。 

句型14
It is +形容词(possible, impossible, necessary等) ＋for+ sb.+ to do. 如： 
It is impossible for me to finish this work before tomorrow.我明天之前完成此工作是不可能的。

句型15
It is +（心理品质方面的）形容词＋of + sb. +to do.= 主语+ be +形容词＋to do.(常用的形容词有：kind, stupid; foolish, good, wise等。)如： 
It is kind of you to help me.＝You are kind to help me.你真好给我提供了帮助。