是at the pool还是for the pool还是 to the pool 还是on the pool

swimming (at)还是(in) the swimming pool in the pool&at the pool in the pool和at the pool 在游泳池里应该是in the swimming pool还是on the swimming pool The boy is swimming at the pool.为什么是at the pool?用in the pool who swims in the pool还是who swim in the pool in the pool at the pool 有什么区别? at the swimming pool和in the swimming pool THE POOL怎么样 THE POOL DATE怎么样 Swimming in the pool with friends_____very interesting 填is还是 We are enjoying_____ in the pool 填swim还是swimming