英语补全对话中的一些必背句型包括：

电话用语

May I speak to Tom？ 我可以和汤姆通话吗？

This is Tom speaking. 我是汤姆。

Who is that （speaking）？ 请问您是谁？

Hold on, please. 请别挂。

Can you take a message for me？ 我可以给他留言吗？

Can I leave a message to him？ 我可以给他留言吗？

Sorry, he isn't in. 对不起，他不在家。

I'll ask Tom to call back later. 我会让汤姆稍后给您回电话。

Could you ask him to call me back？ 你可以让他给我回电话吗？

What's your telephone number？ 你的电话是多少？

购物用语

Can I help you？ 需要帮忙吗？

What can I do for you？ 我可以为您做什么？

I'd like to buy/I want to buy 我想要买

What's your favorite color？ 您喜欢什么颜色？

Do you have a blue one？ 您有蓝色的吗？

- Can I try it on？ - Sure. -我可以试穿吗？

What size do you want？ 你想要多大尺寸？

How much is it？ 多少钱？

I'll take it. 我会买它。

Kind of… would you like 你想要什么种类的……

日常社交用语

Good morning!/Good afternoon!/Good evening! 早上好/下午好/晚上好!

How are you？ 你好吗？

Fine, thank you./How do you do？ 你好吗？

Thank you./Thanks./Thanks a lot./You're welcome./That's all right./That's OK./Not at all./It doesn't matter./Sorry./I'm sorry./I'm sorry to...

I don't mind./That's fine./You'd better.../Shall we do.../What about doing.../Why not do...？/Would you like to do...？

OK./Sure./All right./Yes, please./I think so./Great./Good idea./Have a good time./Congratulations.

这些句型涵盖了电话交流、购物和日常社交中常见的表达，对于提高英语口语能力非常有帮助。建议学生将这些句型熟记于心，并在实际对话中多加练习。