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 спасибо

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.