在英语写作中，一个好的开头和结尾往往能够为整篇文章增色不少。掌握一些万能的句式不仅能够帮助我们快速组织语言，还能让文章显得更加流畅自然。下面是一些适合不同场合使用的英文作文开头和结尾的万能句。

开头万能句

1. "From the very beginning of time, there has been a constant search for..."

2. "In today's fast-paced world, the importance of... cannot be overstated."

3. "Have you ever wondered why...?"

4. "The topic of... is one that has fascinated many people over the years."

5. "It is often said that... and I believe this statement holds true in many cases."

这些句子可以用于讨论各种主题，比如科技、文化、教育等。它们既能够吸引读者的注意力，又能引出接下来的内容。

结尾万能句

1. "In conclusion, it is clear that... plays a crucial role in our lives."

2. "To sum up, while there are challenges ahead, we must remain optimistic about the future of..."

3. "As we have seen, the impact of... on society is profound and far-reaching."

4. "In light of these points, it is evident that... will continue to shape our world."

5. "Ultimately, the choice lies with us to make a difference in..."

结尾部分需要总结全文，并且给读者留下深刻印象。以上句子可以根据具体情况进行适当调整，以适应不同的写作需求。

通过使用这些万能句，即使是英语写作初学者也能写出结构清晰、表达准确的文章。当然，在实际应用时，还需要结合具体的语境和个人风格来灵活运用，这样才能真正提升自己的写作水平。记住，多读多练是提高写作能力的关键所在！