完形填空中的逻辑关系主要有以下几种：

同义并并列关系 ：这种关系指的是通过使用同义词或近义词来并列表达相似或相同的意思。例如：and, or, neither…nor, either…or, not only…but also, likewise, similarly, equally, same as, as well as, in the same way, that is to say。

反义转折关系 ：这种关系通过使用反义词或转折词来表达相反或相对的意思。常见的转折词包括：but, however, yet, on the contrary, by contrast, unfortunately, although, even though, nevertheless, in spite of, regardless of, anyhow, instead of, rather than, not…but。

举例说明 ：这种关系通过具体的例子来说明或证明前面的观点或事实。例如：for example, for instance, such as, in order to, as a result, due to, thanks to, in response to, on account of, because of, considering that, seeing that, in that, now that, lest, as a result, for this reason。

因果关系 ：这种关系通过使用因果连词来表达原因和结果的关系。常见的因果连词包括：because, for, since, as, thus, hence, therefore, so, so…that, such…that, in order that, consequently, accordingly, due to, thanks to, in response to, on account of, because of, considering that, seeing that, in that, now that, lest, as a result, for this reason。

总分关系 ：这种关系通过总述和分述的方式来表达一个中心思想。例如：first-then, to begin with-to continue （next）, on one hand-on the other hand, for one thing-for another thing, one-another, some-others-still others, in the first place-in the second place-finally, first-second-last of all。

递进关系 ：这种关系通过使用递进词来表达一种程度上的增加或进一步说明。常见的递进词包括：also, besides （注意区分except）, additionally, in addition, furthermore, moreover, what's more, indeed *indeed与furthermore区别 indeed确实含强调的递进，指同一件事情程度的上升 such as前：名词复数后：单数或复数关系：总分或包括。

对比关系 ：这种关系通过使用对比词来表达两个事物或观点之间的对比或相反。常见的对比词包括：on the other hand, in contrast, contrary to, contrarily, by contrast。

这些逻辑关系在完形填空题目中经常出现，掌握这些关系有助于提高解题的准确性和效率。