[i-adj 〜い → 〜くて] [na-adj] + で [noun] + で
くて and で join an adjective or a noun to what comes next: "and", or "and so". An い-adjective changes its final い to くて; a な-adjective or a noun takes で. Only the last part of the sentence carries the tense and です.
いい becomes よくて. きれい and ゆうめい有名 end in い but are な-adjectives, so they take で.English "and" pulls learners towards と, but と joins nouns only. Two adjectives are joined with くて or で.
Two qualities joined with くて or で point the same way: both good, or both bad. When one is good and the other bad, use けど or が.
The first part often gives the reason for the second. In that case the second part is a feeling or a result, not a request, an invitation or a wish.
These go beyond joining two descriptions.
The chain can run as long as you like. Each part but the last takes くて or で.
The joined adjectives can describe a noun directly. Only the last one is in its noun-describing form: い stays い, and a な-adjective takes な.
To describe a person or thing by its parts, the whole takes は and each part takes が. くて or で links the parts.
The second part can be a verb phrase describing a lasting state, such as にんきがある人気がある or きごう〜やすい.
An い-adjective's negative ending ない becomes なくて; a noun or a な-adjective takes じゃなくて or ではなくて.