look forward to hearing from you中to后面不是应该用动词原形吗?

问题描述:

look forward to hearing from you中to后面不是应该用动词原形吗?

look forward to解释为期望、期待
look forward to sth/doing sth.(固定用法)
to在这里相当于介词,后面要接名词或者doing