Damn, I thought about writing a sentence using the same grammar point, but you got ahead of me 
もう！。。あのやつは絶対に謝ろうとしないよ！そうしたら、俺も謝るわけがない！
Ugh! That guy will never apologize, no matter what! If that’s the case, there’s no way I’m apologizing either!
ごめんね!
I’ve being seeing your sentences and reckon we must be studying exactly the same grammar points と同時に. 
Actually, it was reading your sentences that gave me the push to go for it.
それで、日本語の例文を書いてくれてありがとうございます、リエアヅさん。 
That’s really cool, let’s keep it up!
Bonus sentence!
コーラは塩が入っていることになんか信じにくい。。。しょっぱいじゃないから！
It’s hard to believe that cola contains salt… because it’s not salty!
Thank you for the in-depth correction, this is hugely helpful.
Day 2:
あれも寿司良くなかった。
That sushi was also not good.
リエアヅさんと同じで、毎日のように一文を書いてみている。
Just like lieath, I try to write a sentence almost every day.
Hi there!
もう一度、nicely done! 残念だった、あの寿司！ 
The only thing I would tweak is ‘あれも寿司’. This does not make real sense in Japanese, it would be said as ‘あの寿司も’, using ‘あの’ instead of ‘あれ’ as you are referring to ‘that sushi’.
頑張ってね！
日本語の文法は難しいが楽しいですね。
Japanese grammar is difficult but fun, isn’t it?
たとえ日本に一度も行かなくても、日本語の勉強をけして止めない。だって、日本語が大好きだよ！
Even if I never go to Japan, I will never stop studying Japanese. Because I really love Japanese!
うわ! クリスマスツリーの下に沢山のプレゼントがあるんだよ！ クリスマスの日に違いない。
Wow! There are so many 
under the 
! There is no doubt it’s Christmas Day. 
ああ、今日はお正月なのに、一体どうしてみんなと祝う代わりに、雪かきをしてますか？なんて残酷な運命だ。。。
Ahh, today is New Year’s Day, but instead of celebrating with everyone, why in the world am I shoveling snow? What a cruel fate…
Generally speaking, the sentence final verb indicates the overall tense and speech style. Some grammar forms require the use of short/casual forms but do not necessarily determine the politeness level of the utterance.
Sometimes where conjunctions do allow for the ます form to be used, it will generally carry a very formal tone.
大人が正しい。
The adult is correct.
Surprised to see this thread still going not gonna lie. Been a while since I posted last.
昨日、ゲームをしすぎたあまり、勉強することが忘れてしまった。
I forgot to study yesterday cause I played games too much.
驚くことに、クラスに入った時に中に誰もいなかった。完全な静けさで、のどかな雰囲気を感じることができて、まるで悩み事は全部飛んでいったようだ。たとえちょっとくらいだけ。
Surprisingly, when I entered the class, there was no one inside. It was completely quiet and I could feel a peaceful atmosphere, as if all my worries had flown away. Even if just for a little while.
猫は声がすごくかわいいわね。
Cats make very cute noises.
この近所でレストランへ食べに行きたければ、花倉という日本料理の食店に限るよ。
Would want to go to eat to a restaurant in the neighbourhood, there is no better place than a Japanese one called Hanakura.
私はときどき自分の猫がどんなことを考えるかな。。。
Sometimes I wonder what kind of things my cat is thinking about.
明日は新しい雑誌が届けられるんですけど。一人当たり二部受けるということは言うまでもありません。どうしてかというと、今年は全員が一生懸命働いたからです。
Tomorrow the new magazines will be delivered. It goes without saying that there will be two copies per person. If you ask me why, it is because all employees have worked their hearts out this year.
ーあっ、借りた上着がちょっと汚くなって、ごめん。
ー「ちょっと汚くなって』じゃねえよ！その上着は泥だらけにされてしまって、もう助かれない！言い訳を言うより、ちゃんと自分のせいを確認して、結果を担いなさい！
ー Oh, that jacket that I borrowed from you got a little dirty, sorry.
ー Don’t you say “a little dirty”! That jacket is covered in mud and there’s no way to save it! Instead of making excuses, admit your fault properly and take responsibility for the consequences!