It + be + adj.+ that...
主语从句中常见的一种形式，即以引导词that引出的主语从句，常以形式主语it 代替。
主语从句的时态不受主句的时态影响和限制，根据句子意思用适当的时态。
结构：It is+adj.+that从句。
常用于这个句型的形容词有：necessary, important, clear, strange, true, good, wonderful, possible, unusual, certain, surprising;
interesting等。
根据汉语意思完成句子。
1．他可能已经把一切都告诉她了。
____ is possible that he ____ ____ her everything.
2．海怪突然出现了很奇怪。
It ____ _____ that sea monsters suddenly ___________.
3．毫无疑问她将会在测验中做得很好。
It is certain _____ she ____ ____ well in her exam.
用适当的形容词填空
1. Miss Li often says that it is ________ to learn a foreign language well.
2. Look at the black clouds in the sky. It is ________ to rain soon.
3. It is ________ that Sunday is the first day of the week.
4. Isn’t it ________ that chickens can swim?
5. Is it ________ the lazy boy can catch up with all his classmates?
很多形容词可以与介词连用。
我们已学过很多这样的搭配，现在一起来复习一下。
形容词与某个特定的介词连用，表示某个特定的意思。
①与about连接的形容词：be worried about“担心……”；be excited about“对……感到兴奋”；be careful about“小心、谨慎”；be mad about“狂热地迷恋”；be anxious about “为……感到焦虑”；feel nervous about/ at“对……感到心神不安”。
②与at连接的形容词：be shocked at“对……感到震惊”；be good at“擅长……”；be bad at“在某方面不好或坏”；be angry at/ about sth“对……生气”；be mad at sb“对……发怒”；be surprised at“对……感到惊讶”。
③与as连接的形容词：be famous/ known as“作为……而著名”；be known as “被叫作……”。
④与for 连接的形容词：be good for“对……有好处”；be bad for“对……有害”；be afraid for“为……而担心”；be famous / known for sth“因……而著名”；be mad for “渴望”；be happy for“为……感到高兴”；be responsible for“负责，有责任”；be free for“对……免费”；be available for“有空的”；be thankful for“感谢，感激……”；be ready for“为……做准备”。
⑤与from 连接的形容词：be different from“与……不同”。
⑥与of 连接的形容词：be short of“缺乏……”；be afraid of“害怕……”；be unaware of “没意识到……，不知道……”；be tired of“厌倦，厌烦……”；be proud of“为……感到自豪”；be full of“充满……的”。
⑦与on 连接的形容词：be based on“基于，根据”；be keen on“喜爱”；be dependent on “依靠”。
⑧与in连接的形容词：be interested in“对……感兴趣”；be absorbed in“专心致志，全神贯注”。
⑨与to连接的形容词：be similar to“与……相似”；be friendly to sb“对某人友好”；be friendly to sth“对……有利”；be known to“被……所知”；be rude to “对……粗鲁”；be grateful to sb“感激某人”；be equal to“与……平等”；be different to“与……不同”；⑩与with连接的形容词：be angry with sb“对某人生气”；be strict with“对……严格要求”；be bad with sth“有……病”；be bored with“对……感到厌倦”；be good with“与……相处得好”；be crowded with“挤满了……”；be happy with “对……感到满意，放心”；be pleased with“对……感到满意”；be delighted with“对……感到满意”；be satisfied with “对……感到满意”；be filled with“填满”；be busy with“忙于……”。
同一个形容词与不同的介词连用，表示不同的意思。
例如：
①be good at“擅长……”；be good for“对……有好处”；be good with“与……相处得好”。
②be bad at“在某方面不好或坏”；be bad for“对……有害”。
③be happy for“为……感到高兴”；be happy with“对……感到满意”。
同一个形容词与不同的介词连用，表示不同的意思。
例如：
①be good at“擅长……”；be good for“对……有好处”；be good with“与……相处得好”。
②be bad at“在某方面不好或坏”；be bad for“对……有害”。
③be happy for“为……感到高兴”；be happy with“对……感到满意”。
其他
①be angry with sb“对某人生气”；be angry at/ about...“对……生气”。
②be friendly with/ to sb“和/对某人友好”；be friendly to sth“对……有利”。
③be different to/ from“与……不同”。
用恰当的介词填空。
1. John is good ____ swimming.
2. Judy is very proud ____ her English.
3. Don't be afraid ____ singing in public.
4. Children are dependent ____ their parents.
5. Jane is quite equal ____ Bill in brains.
6. She was tired ____ doing her homework.
7. The architect was busy ____ his new design.
8. Some European countries are famous ____ their castles.
9. You don't have to be worried ______ them. They are OK.
10. I'm very grateful ____ my parents and teachers.
根据句意，用适当的介词填空。
1. Why was her maths teacher so angry ____ him this time?
2. Could you lend me some money? I am a bit short ____ money these days.
3. Children are always curious ____ everything around them.
4. Sichuan is famous ____ its food. But the food tastes too hot for me.
5. I can’t understand why the little boy is so excited ____ fashions.。