屋根が

the roof

→ 屋根
phrase Rare #26,497
the roof 屋根 means “roof,” and が marks it as the subject. It can be followed by a description, as in “a house whose roof is green,” or by a predicate such as “doesn’t close.”
JA: 屋根が青い家に住んでいます。
EN: I live in a house whose roof is blue.

屋根が緑色の建物は何ですか

What is the building with the green roof?

屋根が閉まらない

The roof won't close.

— ライフ・イズ・ビューティフル (1997)

屋根が緑色の家が私の家です

The house with the green roof is mine.

彼は赤い屋根が向こうに見える家に住んでいる

He lives in the house whose red roof you can see over there.

屋根が赤いあの家トムの家

That house with the red roof is Tom's house.