Найдите в предложениях ошибку : 1.have you to arrive at school early ? 2.they not have to have lunch at school . 3.we has to work hard at school .4 harry don't have to get up early . и заранее

1. Have you arrived at school early? - Ты пришел в школу рано?
2. They don`t have to have lunch at school. - Им не приходится обедать в школе.
3. We have to work hard at school. - Мы должны усердно работать в школе.
4. Harry doesn`t have to get up early. - Гарри не приходится рано вставать.