英语课堂中常用的口语表达包括：
准备上课
Let's get ready for class.
Come on now, let's wait outside our classroom.
开始上课
It's time for class.
Let's begin our lesson.
Class begins.
课堂指令
Stand up, please!
Sit down.
Close your book, please.
Be quiet, please.
Listen carefully.
Watch carefully.
提问与请教
Can you explain this again, please？
What does this word mean？
Can you give me an example？
I don't understand this part.
Could you repeat that, please？
参与课堂活动
I think the answer is ...
Can I try？
I'm not sure, but I'll guess.
表达意见与建议
I have a different opinion.
I think this is too hard.
课堂问候与结束
Good morning, boys and girls!
Good afternoon, everyone!
Good-bye, Mike.
See you tomorrow.
其他常用语
Pardon？
Again, please.
I'm sorry I'm late.
Excuse me for coming late.
Who's on duty today？
Is everyone here？
Good night, Jane.
这些表达涵盖了课前准备、上课开始、课堂指令、提问与请教、参与课堂活动、表达意见与建议、课堂问候与结束等多个方面，是英语课堂上常用的口语表达。