we flew kites for a long time 语法对吗

we flew kites for a long time 语法对吗 1、We flew kites there. 2、 Yes,we had a good time.写出问句 we work for a long time.for? We ______ for quite a long time. we work for a long time. He stayed in hospital for a long time.语法对吗?对的请给出翻译,不对请说明原因.谢 讲讲keep sb.waiting for a long time的语法 We waited a long time for the train.为什么a long time前不加for啊 We have worked for a long time,so_____ a rest We have been waiting a long time.不用for a long time we waited a long time for the bus -We haveng't heard from jane for a long time.