My dog ran out of our house when I opened the door. He almost got hit by a car.
My dog made a mad dash as soon as our front door was opened. I thought he was going to get run over by a car.
ーMy dog ran out of our house when I opened the door. He almost got hit by a car.
「うちの犬がドアを開けたときに家から逃げて、車に轢かれそうになった」
to run out of ... で「走り出る」
to get hit by a car で「車にひかれる」
ーMy dog made a mad dash as soon as our front door was opened. I thought he was going to get run over by a car.
「うちの犬が玄関のドアが開いた瞬間に一目散に突進して、車に轢かれるかと思った」
to make a mad dash で「一目散に突進する・猛ダッシュする」
to get run over by a car で「車にひかれる」
ご参考まで！
My dog ran out and almost got hit by a car.
run out は
「飛び出す」「外へ走り出る」
almost got hit by a car は
「車に轢かれそうになった」
という意味です。
例文
My dog ran out and almost got hit by a car.
犬が飛び出して車に轢かれそうになりました。
My dog suddenly ran out of the house.
犬が突然家から飛び出しました。
カナダ 
アメリカ合衆国 
