作业帮it作形式主语
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/10 13:47:23
it is +adj后面什么时候接to do ,什么时候接doing 如何区别？
解题思路： 如下
解题过程：
1．It is ＋adj．(＋for sb．／sth．) ＋ to do sth．
用于此句型的形容词有：easy，hard，difficult，possible，important，impossible， necessary，good，bad，exciting, interesting，surprising等。如：
It is necessary to change your job．
It was very hard for them to walk such a long way in the snow．
2．It is ＋n．(＋for sb．／sth．) ＋ to do sth．
用于此句型的名词有： pity, shame, pleasure, one's duty, one's job, fun, joy, good manners, bad manners等。如：
It is a pity for you to have missed such a wonderful play．
It is bad manners for the young to take up the seats for the old．
3．It is ＋adj．＋of sb．＋to do sth．
此句型中的形容词主要描述某人的品德、特征。能用于该句型的形容词有：
kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。如：
How silly it was of you to give up such a good chance！
It is friendly of the family to try to make me feel at home in their house．
4． It is ＋adj．（＋n．）＋doing sth．
此句型中的形容词和名词常见的有：no／little use, no／much good, useless等。如：
It's no use crying over spilt milk．
最终答案：略
解题过程：
1．It is ＋adj．(＋for sb．／sth．) ＋ to do sth．
用于此句型的形容词有：easy，hard，difficult，possible，important，impossible， necessary，good，bad，exciting, interesting，surprising等。如：
It is necessary to change your job．
It was very hard for them to walk such a long way in the snow．
2．It is ＋n．(＋for sb．／sth．) ＋ to do sth．
用于此句型的名词有： pity, shame, pleasure, one's duty, one's job, fun, joy, good manners, bad manners等。如：
It is a pity for you to have missed such a wonderful play．
It is bad manners for the young to take up the seats for the old．
3．It is ＋adj．＋of sb．＋to do sth．
此句型中的形容词主要描述某人的品德、特征。能用于该句型的形容词有：
kind, nice, wise, silly, polite, impolite, friendly, foolish, clever等。如：
How silly it was of you to give up such a good chance！
It is friendly of the family to try to make me feel at home in their house．
4． It is ＋adj．（＋n．）＋doing sth．
此句型中的形容词和名词常见的有：no／little use, no／much good, useless等。如：
It's no use crying over spilt milk．
最终答案：略