Unit5 Grammar: 复习动词-ing 观察下列例句, 思考划线部分作用
(1) Playing football is his favourite sport
( 主语 ) (2) I didn’t stop working last night
( 宾语 ) (3) My work is teaching English
( 表语)(4) The man sitting by the window is our maths teacher
( 定语) (5) Seeing the teacher entering the room, the students stood up
( 状语 ) (6) I saw the boy walking on the street yesterday
( 宾补 )归纳总结：◆动词-ing 是动词非谓语形式 中的一种,能在句中做除谓语之外的任何其他句子成分
如: 主语、宾语、表语、定语、状语、宾补等
◆在语态上，动词-ing 表示主动
在时间上, 动词-ing 一般表示正在进行的动作
动词-ing 作状语V-ing 作状语时表示的动作是主语动作的一部分，与谓语表示的动作或状态同时或几乎同时发生的，或是先于谓语动词发生，它的逻辑主语与句子的主语一致
V-ing 作状语常表示时间、条件、原因、伴随、让步、结果，多用逗号跟句子其他成分隔开
1) Feeling tired, I went to bed early
2) Having worked hard all day, I went to bed early
1）作时间状语 eg:Walking along the street, I met Mary
(=While I was walking along the street, …) 练习：Hearing (he
