Play volleyball is very interesting.Playing volleyball is very interesting.

问题描述:

Play volleyball is very interesting.Playing volleyball is very interesting.
请问哪一句是正确的,play加ing和不加有什么不一样,
不加ing 为什么是错呢,我觉得意思也正确啊,加了,又为什么是对,在语法上,怎么理解

动词是不能放在句首作主语的 +ing变为名词形式