英语课堂中常用的口语表达有助于维持课堂秩序、促进教学互动和提高学习效率。以下是一些英语课堂常用的口语表达：
开始与结束课堂
Class begins!上课了!
Class is over. Thank you for your attention.谢谢大家，下课了。
课堂秩序
Be quiet, please. / Keep quiet, please.请安静。
Listen carefully. / Pay attention. / Watch carefully. / Follow along closely.请仔细听/仔细看/仔细跟随。
课堂互动
Can you say that again, please？你能再说一遍吗？
Who's on duty today？今天谁值日？
Is everyone here？都到齐了吗？
Who's absent today？今天谁没来？
Can you explain this again, please？你能再解释一下吗？
请求与指示
Open your books, please. / Close your book, please. / Turn to page XX, please. / Take out your exercise books. / Put your hands up if you have a question. / Come to the front. / Go back to your seat. / Look at the blackboard. / Can you try this activity？请打开书/请合上书/请翻到第XX页/请拿出练习册/如果你有问题请举手/请到前面来/请回到座位/请看黑板/你能试试这个活动吗？
表达意见与建议
I have a different opinion. / I think this is too hard. / I can try. / I'm not sure, but I'll guess. / I think the answer is...我有不同看法/我觉得这个太难了/我可以试试/我不确定，但我会猜一下/我觉得答案是...
道歉与感谢
I'm sorry I'm late. / Excuse me for coming late. / Thank you for your attention. / You're welcome. / Good job!对不起，我迟到了/抱歉我迟到了/谢谢你的注意/不客气/干得好!
这些表达可以帮助教师在课堂上更有效地进行教学，同时也为学生提供了清晰、礼貌的沟通方式。使用这些表达时，教师应保持语速适中，确保每个学生都能理解并跟上课堂节奏。