✔ 最佳答案
通常 verb+ing form係 present continous tense(現在進行式).
is/am/are 後面就要加 ing
e.g.
I am doing homework. / He is eating an apple. / They are playing football.
一些動詞(love / like)後面亦要加 ing
e.g.
I like doing homework. / He love eating apples. / They like playing football.
圖片參考:
http://tw.yimg.com/i/tw/ugc/rte/smiley_34.gif