语法图解
探究发现
①It was foolish of you to lie to your teacher.
②It's no use trying to persuade him to change his mind.
③Her wish is to go to Tokyo to watch the 2020 Olympic Games.
④Our work is serving the people.
⑤People want to know who Mona Lisa is and why she is smiling.
⑥But they looked forward, too, by opening new frontiers in the arts.
⑦The building being built is a new shopping mall.
⑧The bird was lucky and escaped being caught.
⑨Painted by Leonardo da Vinci in the years 1503－1506, the Mona Lisa is a mysterious masterpiece.
⑩All things considered, she is the best student in my class.
[我的发现]
(1)①②句中的黑体部分在句中作主语，③④句中的作表语，⑤⑥句中的作宾语。
(2)由①②句可知，动词不定式和动词ing形式作主语，可以用it作形式主语。
(3)⑦⑧句中，黑体部分都为动词ing形式的被动式，在句中分别为定语和宾语。
(4)⑨句中，黑体部分为过去分词在句中作状语；⑩句中，分词作状语时有自己独立的主语，这叫独立主格结构。
