主系表后面接动名词是什么

主语+系动词+表语+动名词

例如：

be busy doing 忙于做某事

The children are busy doing their homework. 孩子们正忙于写作业。

be worth doing 值得做某事

The house might be worth buying.

那所房子也许值得买。

be/feel comfortable doing 

做某事（感觉）舒适的

I feel comfortable lying on the grass.

躺在草地上我感觉很舒适。