五年级下册英语常用表达法是如下：
一、Where's the teachers' office?
教师办公室在哪里？
二、Do you have a library?
你们（学校）有图书馆吗？
三、It's 6 o'clock. It's time for dinner．
六点了。该吃晚饭
五到六年级英语上下册常用表达法
上册常用表达法：
1. How are you? - I'm fine, thank you. And you?
2. What's your name? - My name is [Name].
3. How old are you? - I am [age] years old.
4. Where are you from? - I am from [country/city].
5. What's your favorite subject? - My favorite subject is [subject].
下册常用表达法：
1. Can you help me, please? - Sure, what do you need help with?
2. What did you do last weekend? - I went [activity].
3. How was your summer vacation? - It was great! I went to [place] and had a lot of fun.
4. What do you want to be when you grow up? - I want to be a [profession].
5. Can you tell me the time, please? - It's [time].