I have already watched the movie.也许你关注看电影的“看”和“电影'的单复数,那我可以明确的告诉你“看”一定用watch而movie要视语境而定,不是一定用单数或复数。如果单指某部电影就用单数否则一般用复数。
I have been seen the movie.
I 've already watched the movie.
你好!翻译:I have already watched the movies
i have seen the movie