[いい → よくて] + B
[na-adj] + で + B
B = adjective, verb, or clause describing an additional quality/state
The て-form of adjectives is used to connect two or more qualities or states in a single sentence, similar to "and" in English. It allows you to describe something with multiple characteristics or link descriptive clauses together.
For い-adjectives, drop the final い and add くて.
The special adjective いい (good) uses its irregular stem: いい → よくて.
For な-adjectives, replace な with で.
The て-form of adjectives can also link a descriptive clause to a following clause that may contain a verb or further description. The first clause often provides a reason or background for the second.
For the negative て-form, use なくて (from ない → なくて).