以下是英语写作中常用的开头和结尾万能句子，结合了不同场景和写作需求整理而成：

一、开头万能句子

1. As far as is concerned

   就……而言

   例：As far as is concerned, the project's success depends on effective communication.

   译：就项目成功而言，有效沟通是关键。

2. It goes without saying that

   不言而喻，……

   例：It goes without saying that honesty is always the best policy.

   译：不言而喻，诚实总比欺骗好。

3. It can be said with certainty that

   可以肯定地说……

   例：It can be said with certainty that climate change is a pressing issue.

   译：可以肯定地说，气候变化是一个紧迫问题。

4. As the proverb says

   正如谚语所说……

   例：As the proverb says, "A stitch in time saves nine."

   译：正如谚语所说，“未雨绸缪，防患于未然”。

5. It has to be noticed that

   必须注意到……

   例：It has to be noticed that the company's customer satisfaction has declined.

   译：必须注意到，公司客户满意度有所下降。

6. It's generally recognized that

   普遍认为……

   例：It's generally recognized that exercise is crucial for good health.

   译：普遍认为，锻炼对健康至关重要。

二、结尾万能句子

1. In conclusion

   例：In conclusion, the benefits of renewable energy are undeniable.

   译：可再生能源的好处不可否认。

2. Therefore, we can conclude that

   我们得出结论……

   例：Therefore, we can conclude that the new policy is necessary.

   译：我们得出结论：新政策是必要的。

3. According to recent statistics

   根据最新统计……

   例：According to recent statistics, 78.9% of college students plan to further their education.

   译：根据最新统计，78.9%的大学毕业生计划继续深造。

4. It's high time that

   该做某事了：

   例：It's high time that we addressed the issue of pollution.

   译：该解决污染问题了。

5. In view of the present situation

   考虑到目前形势：

   例：In view of the present situation, we need to adjust our strategy.

   译：考虑到目前形势，我们需要调整策略。

三、使用建议

• 开头 ：使用上述句型可快速引入主题，增强说服力。建议结合具体事例或数据支撑观点。

• 结尾 ：通过总结、建议或引用权威数据收尾，强化文章逻辑性。四级作文写作时可参考模板结构。

以上句子可根据实际需求灵活调整，建议通过背诵和练习形成语感，写作时注意与上下文衔接。