playing sports for the first

Playing sports is good for us 这里为什么用playing Playing sports is good for everyone,especially for boys and playing sports （is/are）good for our healthy. for the very first for the first time. the boys are playing volleyball() in the sports center What are the benefits of playing sports or being active? playing organized sports is such a common experience in the The students are playing sports.Some.are running,___are swim I found many children playing sports on the playground."play -I got the first place at the sports meeting. "playing sports"是什么意思?