I was taught in college Japanese classes that は was optional with time clauses like 今日、あした、きのう, etc.
Yeah. It honestly feels really stiff and awkward to read. Like this is how you would talk in a press release.
Why is the は necessary in this sentence? I didn't add it and got my sentence marked as wrong.
I didn't include は and my answer was accepted, so I guess Duolingo fixed it.
I had a feeling they would mark it wrong, so I added the は last minute.
Why is karaoke written in katakana? Is it not a Japanese word?
Japanese made word but the 'oke' part is derived from the katakana for orchestra. So techincally im sure you could write it in half kanji/hiragana and half katakana.
The は is unnecessary in coloqual Japanese and and it sounds really innatural.
i wrote カラオケ に いきましよう, あした は.
would that make sense in a normal conversation
It would make sense, but it isnt how you would write it, since its adding tomorrow as a clarification.
How do you say together in casual form?