He was up on a roof removing a television antenna when something went wrong.

他在屋顶上拆卸电视天线时出了问题。

Normally, the television antenna goes on what's called the " roof" (roof), which is the top of your house.

通常，电视天线在所谓的“屋顶” （屋顶）上，这是您房屋的顶部。