I was watching a movie in the cinema with my friends.

我和我的朋友正在电影院看电影。

youdao

I was watching a movie when he called me.

他给我打电话时我正在看电影。

youdao

When I first saw this, I thought I was watching a movie.

我第一次看到这个的时候，还以为自己在看一场电影。

youdao

I will say it another way: watching that movie was a hair-raising experience.

VOA: special.2009.05.03

While I was watching a movie in the living room one morning, a mouse suddenly scampered under the ottoman.

CNN: The secrets to happy house swapping