This activity can not only boradens our horizon but also foster our noble spirits .I guarantee that you will enjoy yourself.请问foster是否要加s
问题描述：
This activity can not only boradens our horizon but also foster our noble spirits .
I guarantee that you will enjoy yourself.请问foster是否要加s
答
要加，因为前面的boraden作为动词（开阔）加了s的，所以后面的foster（培养）作为动词，人称、时态要与前面动词的人称、时态一致，所以要加S
答
不用,foster前面省略了情态动词can
另外boradens打错兼用错,应该是broaden,情态动词can后面的动词不用单复数变化