1、He has been out of/away from school since he was/got ill 2、He hasn't been at/to shool since he got sick. 3、He has been absent from class since he fell ill. 4、He has never been to school since he suffered from the illness.
He has never been to school since his illness.
简单版：He did not go to school since he was ill.(一般过去式） 稍复杂版：He stopped going to school ever since he fell ill.(也是一般现在时，但这个翻译在英语中还有暗含着自从那时起往后都没再去了，因为从你的中外好像也有这种暗含的意味）
He has been absent from school since he got ill. 主句是现在完成时，从句是过去时。
he has been out of school since his illness. 各位大侠多多指教。
He has been absent from school since he was ill.主句是现在完成时，从句是过去时。
答：Being ill,he didn't go to school.详情>>
