七年级英语第一单元所学的句子包括：

问候和介绍

Hello!

Hi!

My name is [Your Name].

What's your name？

I am from [Your Hometown].

Nice to meet you.

询问和回答

How are you？

I'm fine, thanks.

What is your telephone number？

My telephone number is [Your Number].

表达兴趣和爱好

What is your favorite subject？

I like reading books.

He's good at playing badminton.

描述地点和背景

Greece is a country in Europe.

New Orleans is the birthplace of jazz.

I was born in [Your Hometown].

礼貌用语

May I borrow your pen？

Thank you!

You're welcome.

这些句子涵盖了日常生活中的基本交流，包括问候、介绍、询问、回答、表达兴趣和爱好、描述地点和背景以及礼貌用语。希望这些信息对你有所帮助。