英语作文中的从句使用能够使句子更加丰富和精确，但要写好从句，需要注意以下几个方面：

确定主从句关系

明确主句和从句的关系，主句表达的核心意思，并在从句中给予进一步的说明或解释。

确定从句类型

识别从句是名词从句、形容词从句还是副词从句，这有助于理解从句的用法和功能。

选择连接词

根据主句和从句的语义关系，选择合适的连接词来引导从句，如that, if, whether等。

确定从句的位置

将从句放在合适的位置，通常是主句之后或中间，并使用逗号或其他标点符号连接。

注意从句的语法和结构

确保从句的语法结构正确，包括主谓一致、时态一致等。

确保从句的含义清晰

使从句的含义明确，与主句的意思一致，并注重表达方式的准确性。

检查整体句子

将主句和从句组合成完整的句子，并检查语法、拼写和标点使用是否正确。

此外，还可以参考以下实用句型：

开头句型：

As far as ...is concerned

It goes without saying that...

It can be said with certainty that...

As the proverb says,

It has to be noticed that...

It’s generally recognized that...

It’s as mentioned above...

However, we have to look at the other side of the coin, that is...

结尾句型：

I will conclude by saying...

Therefore, we have reason to believe that...

All things considered, it may be said that...

Therefore, in my opinion, it’s advisable to...

From what has been discussed above, we can safely draw the conclusion that...

The data/statistics/figures lead us to the conclusion that...

It can be concluded from the discussion that...

举例句型：

Let’s take...to illustrate this.

For example, ...

Let’s take the above chart as an example to illustrate...

通过以上步骤和实用句型，可以有效地提高英语作文中从句的写作水平。