看电影 怎么能用see

watch 或 see 都可以

加不加already都可以，加了有强调“已经”的意思。

it doesn't matter about the already
you can add or not
it up to you.

i have seen it是对的,现在完成时态本来就表示过去所做的事情对现在的影响和意义,所以无须加already,另外去看电影也可以说i have gone to the cinema for it

应该是i had seen it ，already加不加都可以.
already 只起强调作用。

可以