けいようしを つなぐ
Linking adjectives — “it's A and B”

Drop the い, add くて.
たかくて = tall and …
Just add で. The last adjective keeps its normal ending.
しずかで = quiet and …
Same く, new destination: 〜く なります. な-adjectives and nouns take に.
やすく なりました

おおきくて あたらしい いえですね。

“It's a big, new house, isn't it?”
ぶんけい
The link depends on the first adjective's type. 🔊 Tap any example to hear it.
Link from an い-adjective — drop い, add くて. “It's A and B.”
Link from a な-adjective — just add で. “It's A and B.”
〜く なります
You've just turned たかい into たかくて. Keep that same く and put なります after it, and you can say a thing changed: たかく なりました — “it got expensive”. な-adjectives and nouns are the ones to watch: they take に, not the で they used for linking. 🔊 Tap any example to hear it.
“It becomes ~.” Drop the い and add く — the same く you just used for 〜くて — then なります. Use なりました for a change that has already happened.
な-adjectives and nouns take に — not the で they used for linking. This is the one place the two ends of this unit part company: 〜で links, 〜に becomes.
かいわ
Answer with two adjectives linked by 〜くて or 〜で.

この へやは しずかですか。
Is this room quiet?

はい、しずかで きれいです。
Yes, it's quiet and pretty.

その くるまは たかいですか。
Is that car expensive?

はい、 あたらしくて たかいです。
Yes, it's new and expensive.
Phase G まとめ
First pick the link (くて/で); then pick the second adjective that actually fits; and last, く or に for なります. The English meaning tells you which.
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