英语演讲稿的开头和结尾可以采用以下几种模板：

开头模板

欢迎听众

Good morning/afternoon/evening, everyone. It's my honor to be here today.

引用名言或谚语

"Success is not final, failure is not fatal: It is the courage to continue that counts." - Winston Churchill

提出问题或话题

Have you ever wondered how artificial intelligence will change our future？

自我介绍

My name is [Your Name]. It is a great pleasure to stand before you today.

感谢听众

Thank you for inviting me to speak to you today.

结尾模板

感谢听众

Thank you for your attention. It was a pleasure to share my thoughts with you.

总结演讲内容

In conclusion, we've discussed the key points of our topic and how they impact our lives.

留下联系方式

For any further questions or discussions, please feel free to reach out to me at [Your Email/Phone Number].

号召行动

Let's work together to make a positive change in our community.

以趣事结尾

As I was saying before, we have a lot to be grateful for. And remember, a little laughter can go a long way.

反问结尾

So, what can we do to ensure that our actions today pave the way for a brighter tomorrow？

陈述句结尾

It's time for us to take action and make a difference.

展示演讲大纲

To wrap up, let's quickly go over the main points we've covered.

这些模板可以根据你的演讲内容和风格进行适当调整，以确保你的演讲既专业又有吸引力。