Comparing with (to) 的表达方式应用作一个副词，但却经常被误用。最常见的这类错误列举如下：
- Comparing to the previous results, the present results are much more complete.
- Comparing with the thermal velocity, u is quite small.
- The present results are much more complete than the previous results.
- In comparison with the thermal velocity, u is quite small.
上述例句中的问题是因为语法错误。为了理解这点，首先要注意尽管comparing with (to) 整体用作副词，但当出现在此类表达中时，comparing是一个（现在）分词，表示的是一个分词短语。通常，如果现在分词短语出现在句首，后面接续的主句的主语必须与分词的主语相同。（如果不相同时，此分词则被当作“垂悬分词”。）在例句(1)和(2)中, “comparing”（隐含）的主语是一个人（理解为we或I最自然），而主句的主语则为“result”和“u”。
在以下例句我们说明一下comparing with (to) 的准确用法。
- Comparing with the observation for Titan, we identify the following discrepancy.
- However, comparing to the unfiltered sample, we can show that our treatment is useful.
尽管在(3)和(4)中列举的用法是正确的，但在大部分情况下comparing会和介词with或to一起用，包括comparing的直接宾语，会出现在最自然的英语语言中。这点用于上述例句中，我们会采用以下句子：
- Comparing the present observations with the observation for Titan, we identify the following discrepancy.
- However, comparing our sample to the unfiltered sample, we can show that our treatment is useful.
