一般情况下，直接在动词原形后面加 -ing.
going asking finding working being seeing printing raining standing studying speaking spelling。
扩展资料
以不发音的`-e 结尾的动词，去-e ，再加-ing。 coming taking firing encircling writing becoming breathing leaving
闭音节的单音节词，或以重读闭音节结尾的多音节词，这些词的末尾只有一个辅音字母时，双写这个辅音字母，再加 -ing.
sitting running getting cutting stopping beginning planning permitting
求以y结尾的动词-ing形式没什么特殊的变化,直接加ing
