信用证保兑和不保兑:翻译he ought to write to his teacher now that he knows the address.

翻译he ought to write to his teacher now that he knows the address. He learned to （read and write）.括号提问 讲讲ought to的用法 ought是什么意思啊？ought to呢？有什么用途？ 用should，ought to，have to填空 The teacher will write to me as soon as he can Did he write a letter to him?(改为被动语态） ought to与should有何区别？ You ought to wear warmer clothes. ought to 和 may 有什么区别