看电影用英语说是"watch a movie"。野餐用英语说是"have a picnic"。

这两个短语都是源自英语。在英语中，"watch"是动词，意思是"看"，"a movie"是名词，意思是"一场电影"。所以"watch a movie"就是"看一场电影"的意思。

"Have"是动词，意思是"有"或"拥有"，"a picnic"是名词，意思是"一次野餐"。所以"have a picnic"就是"举办一次野餐"的意思。

下面是一些例句：

"I'm going to watch a movie tonight." (我今晚要看电影。)
"Do you want to join me and watch a movie?" (你想和我一起看电影吗？)
"We had a picnic in the park yesterday." (我们昨天在公园里举办了一次野餐。)
"I think it's a perfect day for a picnic. Would you pke to join me?" (我觉得今天是个完美的野餐天气。你想和我一起去吗？)