V-ました

昨日(きのう)、映画(えいが)を見(み)ました。

Kinō, eiga o mimashita.

I watched a film yesterday.

Talking about what you did

もう昼(ひる)ご飯(はん)を食(た)べました。

Mō hirugohan o tabemashita.

I have already had lunch.

もう plus the past form politely turns an invitation down

去年(きょねん)、日本(にっぽん)へ来(き)ました。

Kyonen, Nihon e kimashita.

I came to Japan last year.

Saying when you arrived, in a self-introduction