在国外留学时，英语口语的应用场景非常广泛，以下是一些可能用到的表达：
机场相关
询问座位情况：
Can I have a window/aisle seat, please？
需要转机：
I have a connecting flight to… Where's the transfer counter？
Will I have to claim and re-check my baggage for connecting？
行李托运：
Where can I check in my luggage？
Can I carry on my luggage？
航班信息：
What time is my flight？
What is the departure time and arrival time？
Is this a direct flight or do I need to change planes？
交通出行
询问路线：
Could you please tell me how to get to the university？
What is the best way to get to the city center？
交通工具选择：
Which bus should I take？
Can I take a taxi？ How much does it cost？
Where is the nearest subway station？
预订票务：
I would like to book a ticket to [destination].
Can I have a return ticket to [destination] as well？
日常生活
购物：
How much does this cost？
Do you accept credit cards？
Where can I find [item]？
餐饮：
I would like to order [dish], please.
Can I have the bill, please？
Is this dish spicy？
住宿：
I need a room for [number of nights].
Can I have a quiet room, please？
Where is the nearest hotel？
学习相关
课程选择：
What courses are available for the fall semester？
How can I register for [course]？
学术讨论：
I have a question about [topic].
Can we discuss [project] during office hours？
图书馆：
Where is the library？
How do I borrow books from the library？
紧急情况
求助：
Can you help me？ I need assistance.
There is an emergency, please call the police.
医疗：
I need to see a doctor, where is the nearest hospital？
What is the emergency number？
这些表达可以帮助你在国外留学时更好地应对各种日常场景，提高英语口语的流利度和自信心。建议你在实际应用中不断练习和复习这些表达，以适应不同的环境和需求。