Let's go swimming!这个swimming为什么要ing?

let's ______(go) swimming after school What l______ weather!Let's go swimming. let's go hiking ()of going swimming Let's go to swim .跟 Let's go swimming . swimming pool中的swimming为什么要双写加ing went swimming 为什么swim要加ing swimming lesson为什么swim要加ing He often swimming为什么要加ing she likes swimming 为什么要加ing let's -----(go) swimming after school.这个动词怎样填.有after shool . Let's go swimming now用英语解释句子 let's go swimming at this weekend改为否定句