英语A级作文是高级别的英语写作，需要具备一定的语言表达能力和写作技巧。在英语A级作文中，使用恰当的句子结构可以提高文章的质量和评分。下面是一些常用的英语A级作文万能句子结构。

一、引言句型

1. As far as I am concerned, ...

2. From my point of view, ...

3. Personally, ...

4. In my opinion, ...

二、转折句型

1. However, ...

2. Nevertheless, ...

3. On the contrary, ...

4. Despite the fact that, ...

三、因果句型

1. As a result, ...

2. Consequently, ...

3. Therefore, ...

4. Thus, ...

四、强调句型

1. Indeed, ...

2. In fact, ...

3. Undoubtedly, ...

4. It is worth noting that, ...

五、对比句型

1. On the one hand, ... on the other hand, ...

2. In contrast, ...

3. Unlike ..., ...

4. Although ..., ..., but ...

六、补充句型

1. Furthermore, ...

2. Moreover, ...

3. Additionally, ...

4. Besides, ...

七、总结句型

1. In conclusion, ...

2. To sum up, ...

3. In summary, ...

4. All in all, ...

以上这些英语A级作文万能句子结构可以帮助你更好地组织文章，使文章结构更加清晰，内容更加丰富。当然，在写作时，要根据文章的具体情况来选择合适的句型，避免过度使用某一种句型而导致文章显得单调乏味。