早教吧 育儿知识 作业答案 考试题库 百科 知识分享

they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.

题目详情
they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.
▼优质解答
答案和解析
swimming,to是不定式后面要跟动词原形,这里的swimming是现在分词做状语.