第三：转折关系。常用逻辑连接词有but, yet, however, on the contrary, on the other hand.下面我们看一道真题。看看这样的问题我们应该怎样解决。

1996(50)Many people ,___,believe in being on the “safe side” and thus take extra vitamins. [A]nevertheless [B]therefore [C]moreover [D]meanwhile

我们看这道题的四个选项，就是让我们选择逻辑关系词，所以，我们首先要判断前后两句的逻辑关系。上文说“尽管获取过量的维生素对身体没有营养价值，但获得足够的维生素对人的生命是至关重要的”而这句表达的大概意思为很多人——为了安全起见，服用额外的维生素。从这两句话，我们可以感觉出来是转折关系。因此，纵观四个选项，只有A表示转折，为正确答案。

第四：让步关系。常用逻辑连接词有although, even if, nevertheless, despite, in spite of, regardless of, anyway, anyhow.

第五：递进关系。常用逻辑连接词有aslo, then, besides, in addition, furthermore, what’s more. 我们来看一道考研真题。

1994 The words used by the speaker may _44__ unfavorable reactions in the listener __45__ interfere with his comprehension; hence, the transmission-reception system breaks down.

__46___, inaccurate or indefinite words may make _47____ difficult for the listener to understand the __48___ which is being transmitted to him.

46 [A]Moreover [B]However [C]Preliminarily [D]Unexpectedly

我们看这道题，第一段文字是在说词汇可能会导致听话人错误的理解。而46空格后面继续说用词不准确会怎么样。由此，我们可以看出，这两段之间的关系应该是递进，即进一步说明用词不当会带来的后果。A选项刚好是递进关系比较常见的逻辑关系词。A为正确选项。