句型be busy/enjoy/hate/go on/finish doing sth. 忙于/喜欢/讨厌/继续/完成做某事
在enjoy, finish, hate, go on, be busy等词语后，一般用动词-ing形式作宾语。
Lin Tao is busy making a model plane.
My mother enjoys taking a walk after supper.
I hate watching Channel Five.
When someone asked him to have a rest, he just went on working.
I have finished writing the story.