I was worried my cat might scratch the brand new screen we put in our living room window.
ーI was worried my cat might scratch the brand new screen we put in our living room window.
「うちの猫にリビングの窓に入れた新品の網戸をひっかかれないか心配した」
I was worried で「私は心配だった」
to scratch で「ひっかく」
brand new screen we put in ... で「…に設置した新品の網戸」
ご参考まで!