围绕主题句展开，支持、说明和阐述主题句的句子便是扩展句。扩展句紧扣主题句中的关键词而展开，句子与句子之间逻辑清楚，上下转承结合得当，简明扼要，重点突出。一般来说，每个自然段除了主题句与结尾句之外，还包含了3——6个扩展句。所以可以说，写好扩展句便基本上完成一个自然段落。
小学生经典英语演讲稿范文一：
Good morning, my dear teachers and friends! My name is Li Bingke, from class four O five. Today, I am very happy to be here. My topic is “Our School”.
My dear friends, welcome to our school! My school is very beautiful! It has a big playground. We can play and do some sports there. Near the playground, there is a garden. Many trees and flowers are there. So the air is very clean and we can hear birds singing in the trees. It is so wonderful. Our teaching buildings are around the garden and look like our teachers’ arms to welcome us. We can draw pictures in the art room on the first floor and read story-books in the library on the second floor. My classroom is on the third floor. It is clean and bright. We like to study in it. The computer room is on the fifth floor. We can sing and dance in the music room on the sixth floor. What a lot of fun! We can have lunch in the canteen near Defang Teaching Building.
In our school, our teachers work hard and help us with our lessons. We study hard and listen to teachers carefully. After class, our teachers play with us and we feel very happy.
Our school is so nice and our teachers are so kind. We all love them. Dear friends, do you like them?
That's all. Thanks!
参考翻译：
早上好，我亲爱的老师和朋友们!我的名字是李秉珂。今天，我很高兴到这里来。我的主题是“我们的学校” 。
我亲爱的朋友，欢迎来到我们的学校!我的学校是一个很漂亮的!它有一个大操场。我们可以发挥，也有一些运动。附近的操场，有一个花园。许多树木和花草在那里。因此，空气很干净，我们可以听到鸟儿在树上歌唱。这是如此美妙。我们的教学楼是周围的花园和看起来像我们的老师的怀抱欢迎我们。我们可以画画的美术室一楼和阅读故事书在图书馆的二楼。我的教室在三楼。这是清洁和光亮。我们要研究它。电脑室是五楼。我们可以唱歌跳舞的音乐室六楼。什么有很多乐趣!我们可以在食堂午餐附近德芳教学楼。
在我们的学校，我们的教师努力工作，帮助我们与我们的经验教训。我们努力学习，认真听取教师。下了课，发挥我们的教师与我们联系，我们感到非常高兴。
我们学校是太好，我们的教师是太好了。我们都爱他们。亲爱的朋友们，你喜欢他们吗?
小学生经典英语演讲稿范文二：
Olympic Games and me
I am looking forward the Beijing Olympics on 2008 very much. This is the opening ceremony of the Beijing Olympic Games, and the day the world sports family gathering together, as well as the day Chinese people are really proud of.
As a small master, I really want to become an Olympic volunteer, but I still too young to really become a volunteer. But I can still do something for the Beijing Olympic Games.
First of all, as a citizen of China, I will use my warm heart and smile to greet every foreign friend from all over the world, and to show off our Chinese friendly and hospitable spirit so that every foreign friend will know the city by the faces. Next, I want to learn English harder so that during the Olympics I could speak to foreign friends and community in English, and do my best to help them, For example, be a little translator and to help foreigners when they ask way. Let them know China by the behaviors of us.
Again, I would like to learn more about Beijing's Olympic and for the future to our foreign friends knowing more about our beautiful Beijing, as well as the long history and culture, I would like to mobilize each and every one of my classmates, we will study English more harder and to protect our environment for the Beijing Olympic Games into a true "Green Olympics, People's Olympics, Hi-tech Olympics" from ourselves and from now on. "One world, one dream," I hope my dream will become a reality...
小学生经典英语演讲稿范文三：
In 2008, I will be 9 years old. Many people might say: You are too young to do anything for the Games, but I don’t think so. I am sure I can do a lot for the event.
First, I have the duty to keep our city clean and tidy. I will neither litter nor spit on streets. When I see any waste, I will pick it up and put it into the dustbin. If everybody in Beijing does the same thing, foreign visitors will see a beautiful and clean city.
Next, if I am lucky to go and watch the games on the spot, I will cheer for the players from all over the world.
Last, I hope everybody will smile at foreign visitors. Smile is the best card for Beijing, foreign visitors will feel at home here.
“One world, one dream!” Let’s work together to let the dream of Olympic.gzpinda.come true! Welcome to Beijing! Welcome to China!