We ues glue for _____(stick) some cardboard boxes together.

问题描述:

We ues glue for _____(stick) some cardboard boxes together.

Stick
因为Stick是名词不是动词,在此句用来形容用胶水粘,for 后面加doing sth,stick不是动词所以不用加ing来表示正在做某事的状态。

sticking
stick有动词"粘"的意思,这里需要用ing形式保持for doing sth.的词态