we feel our duty to protect our environment错在哪?

问题描述:

we feel our duty to protect our environment错在哪?

改错:在feel后面加it.这是it做形式宾语的用法.真正的宾语是后面的不定式to protect our environment 结构为:主语(S)+谓语(V)+it+名词(n.)/形容词(adj.)+to do/doing