How do you formulate the 連用中止 with 形容動詞 (な adjectives) and 名詞 (nouns)?

Question

According to my textbook, verb and i-adjective sentences can be chained with the 連用中止【れんようちゅうし】 form like this:

Later on, I came across this exercise where I'm required to replace the adjectives' endings by the corresponding 連用中止. But I do not know how to turn 静かで into 連用中止 in the following sentence:

北海道【ほっかいどう】の7月の海は、深【ふか】く、青【あお】く、静【しず】か ___、絵のように美しかった。

Is this feasible? What about sentences that end with a noun?

Thank you very much

Answer 1

No, you cannot omit で after 静か. As your textbook clearly says, this grammar is about verbs and i-adjectives.

北海道の7月の海は、深く、青く、静かで、絵のように美しかった。

See: いAdjective. difference between くて and く

EDIT: You can also use copula-like である and say "深く、青く、静かであり、絵のように美しかった", too.

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You may see two na-adjectives connected without a particle ("簡単、便利なチャットアプリ" instead of "簡単で便利なチャットアプリ"), but this is another story.