三年级上册英语的标题句通常出现在课本的第一课，用于引入单元的主题和话题。以下是一些三年级上册英语的标题句示例：

I'm going to visit my grandparents.

She’s very nice.

I’m going to help her.

It’s very long.

You’ll see Tower Bridge.

Maybe we’ll go to the zoo.

Will you phone me？

Hello!

How are you？

Good morning!

What’s your name？

My name is Lily.

How are you？

Today is my birthday.

I am ten.

Hello, I am Lily.

This is my new friend.

His name's Zhang Peng.

He's in Class 3.

Let's make some cards for them.

I like blue and pink.

Let’s paint.

I have a teddy bear.

May I have a look？

Have some milk.

Can I have some chicken？

这些标题句涵盖了问候、自我介绍、表达情感和兴趣等多个方面，有助于学生更好地理解和学习英语。建议学生多背诵和练习这些标题句，以提高英语口语和阅读理解能力。