这场电影应该还得演20分钟。用英语怎么说

The movie should be on for another 20 minutes.
或：The movie should be shown for 20 more minutes.

注释：
1. "be shown"或"be on "都可表示“上演”
2.another + 数词 = 数词 + more [表示“再（几个）”]

This movie should also have to develop 20 minutes.

The movie should be shown for another 20 minutes.
the movie will finish in 20 minutes.

This movie will be last for another 20 minutes.

the movie will finish in another 20mins

This movie will last for another 20 minutes.