2011年9月13日 — I would only say "in class," not "at class." I'm not too sure about Cliffyboy's "out of class" question, but a child could certainly be called/ ...
“In class” generally refers to something that happens in the classroom, an event of some kind, whereas “during the lesson” refers more to the learning process
At class 這答案很奇怪,底下資料提供參考: 除了Longman 辭典的資料外,Macmillan English Dictionary, 2nd edition 也只有收錄in class 這樣的組合。
在英文文法中,了解「in class」和「in a class」之間的區別。與Teacher Sammy一起提高您的英語語言能力!
If you mean you were in the middle of a lesson with your teacher (and your classmates), you can say I was in class when you called.
用法:強調地點,不一定是在上課中。 例句: The teacher is in the classroom. 老師在教室裡。 We decorated the walls in the classroom. 我們裝飾了教室裡
Both are possible depending on the context. He is at the class refers to he may be out side or close to the classroom or classroom Premise.