My textbook (A course in modern Japanese, volume two) states the following
(Lesson 11 p.26):

> In spoken language, sentences are connected with the て-form. And in written
> language, they are connected with the verb-base and く-form.

The book gives examples for verbs (行って -> 行き) and い-adjectives (高くて -> 高く),
but I don't know how to handle な-adjectives. The く-form doesn't appear in the
conjugation tables I found in the book. Online, the く-form is mentionned in
the case of adverbs, but I am not sure it is the same thing. For example, is
the following transformation correct?

このかばんはきれいで, やすい -> このかばんはきれいに, やすい ?

(I found [this
answer](https://japanese.stackexchange.com/questions/57082/whats-the-
difference-between-an-adjectives-adverbial-form-and-continuative-for), but it
also only mentions い-adjectives)
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2021-05-15T17:41:36.980
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2021-05-15T17:41:36.980
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question
て-form adjectives na-adjectives
-く form for な-adjectives