"She went swimming in the river" 表示 "她去河里游泳"。

这句话的结构是:主语 + 过去式动词 + 地点副词短语 + 其他。

其中:

"She" 是主语,表示 "她"。
"went" 是过去式动词,表示过去的动作。
"swimming" 是名词,表示 "游泳"。
"in the river" 是地点副词短语,表示 "在河里"。

例句:

She went swimming in the river yesterday.(她昨天去河里游泳。)
They went swimming in the river every weekend.(他们每个周末都去河里游泳。)
I want to go swimming in the river with you.(我想和你一起去河里游泳。)