Akeru Sentence Construction

1.わたし は まど を 開ければ さむく なります

my meaning: If I open the window it will become cold

2.まいにち かいしゃ で まど を 閉めたり、エアコン を 開けたり して います

meaning: Every day at the office I closed it window and open the ac

3.あなた は こめびつ を 開けたら、わたし が 食べられる

meaning: If you should open the rice container I will be able to eat

Is this correct ?

Just a beginner myself, but regarding the AC-window question, I don't think you need to add the formal ending to the sentence. Also, I'm thinking you could use the て ending. I might say, 毎日は会社で窓を閉めてイアコンをつけて。Someone with more knowledge might be able to contribute more on this thought.

As I'm not great with conditionals, yet, I'll defer on the other two questions!

- Michael