转折关系表示后一种观点或事实与前一种观点或事实相比有些出乎意料，前后两句意思相反。其关联词主要有however, yet, but, anyhow, anyway, nevertheless, in spite of, despite, although, though, still, none the less等。在完形填空中的主要考查方式有两种，一种是关系词的判定，需根据文章的逻辑关系进行判断，而另一种反义复现则是考查最多的。反义词的功能是在两个词项之间可以形成一种意义有区别的对比关系，因而也能促使语篇的衔接，达到语义贯通的目的。反义词，包括绝对反义词、关系反义词和互补反义词。

【真题回放1】On the issue of freedom of religion and the position of the church，_____, there was less agreement among the leadership.

[A]therefore

[B]however

[C]indeed

[D]moreover

解析　上段后两句阐述了领导人的共同理想（shared the ideals）和对新国家应具备的特点的共识（generally there was a belief），本句承接上句，说在宗教自由和教会地位这两个问题上意见不太一致（there was less agreement），与上文明显成转折关系，[B]however（然而）表转折，符合此处逻辑要求，故为答案。[A]therefore（因此）表示因果关系；[C]indeed（其实；的确）和[D]moreover（而且）表示递进关系，不符合本句的逻辑要求。(www.daowen.com)

【真题回放2】In fact, instead of straining muscles to build them, as exercise does, laughter apparently accomplishes the opposite. Studies dating back to the 1930s indicate that laughter_____muscles, decreasing muscle tone for up to 45 minutes after the laugh dies down.

[A]hardens

[B]weakens

[C]tightens

[D]relaxes

解析　上一句提到其他运动能拉紧肌肉（straining muscles），既然laughter作用相反，那么laughter会导致肌肉松弛，故答案为[D]relaxes（放松；松弛）, relax与strain反义复现。