grade seven要大写。表示班级时首字母要大写。I am presently teaching ESL for Grade Seven at Maple Leaf junior high school（目前我在枫叶初中教七年级的esl课程）。

Grade Seven的例句：I finished editing my biological document for the first volume of biology textbook for Grade seven's students this morning（今天早上，我完成了对七年级生物上册的生物文档的编辑工作）。