去野餐用英语表达有以下几种译法：

1、have a picnic 双语例句：Yesterday we were going to have a picnic, but it rained.昨天我们要去野餐，但天下雨了。

2、go on a picnic双语例句：We'll not go on a picnic because of the wet ground.我们将不去野餐，因为地面太湿了。

3、go out for a picnic双语例句：We shall go out for a picnic next Sunday. 下个星期天我们出去野餐。