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必修4《Learning about Language》集体备课PPT课件优质课下载
复合结构
一般式
(not) doing
(not) being done
one’s (not) doing
完成式
(not) having done
(not) having been done
one’s (not) having been done
主动
Picking apples can be fun.
Not arriving in time made him upset.
被动
Being invited here is a great honor.
Not being injured in the fire was my luck.
复合
Mary’s coming surprised all of us.
结构
Their not completing the task cost their more time than others’.
动词ing 作主语
常见句式
① 动词ing 放句首 （表示经常性，习惯性的动作。谓语动词常用单数）
② It is + adj. + doing
③ There be no + doing
1. Reading is important for us to learn more about the world.