whereas
conj. 1.然而，但是，尽管； 2.既然，有鉴于[用于正式公文]
1.然而，但是，尽管； Some praise him, whereas others condemn him. 有些人赞扬他, 而有些人谴责他。 She is slender, whereas he is stout. 她很瘦弱，而他却又粗又壮。
Although the figure may vary, analysts do agree on another matter…(2006-7)
Our car is old although it still runs well. 我们的车旧了，然而却很好开。
though
连接词 conj. 1.(最常见，表让步的从属连词)虽然; 尽管; 即使 Though he's fool, I like him nonetheless. 虽然他很笨, 我仍然喜欢他。 It's quite pleasant today, though the wind is rather cool. 尽管风有点凉, 今天天气还是很不错的。
nevertheless
adv. 仍然，不过，然而；尽管如此 conj. 然而，不过： 副词 adv.
仍然, 然而, 不过 What you said was true but nevertheless unkind. 你所说的都对, 不过有点不客气。 连接词 conj.
转折关系
然而，不过 The cop told them to clear out, nevertheless they seemed not to hear. 警察让他们离开，可他们就好像没听见一样动也不动。
while
n. (一段)时间 vt. 1.消磨, 打发(时间)；2.(愉快而懒散地)度过(时间)(常与away 连用) conj. 1.在…期间，当…的时候； 与…同时 2. 虽然， 尽管 3.而，然而
1.引导时间状语从句，意为“当…的时候；和…同时” The phenomenon provides a way for companies to remain globally competitive while avoiding market cycles and the growing burdens.（1997- 8） 2.表示让步,通常位于句首，意为“尽管；虽然” While I agree with your reasons, I can't allow it. 尽管我同意你的理由,但我不能允许这样做。 While most leaders sought to maintain Catholicism as the official religion of the new states， some sought to end the exclusion of other faiths.（2007-12） 3.表示对比或转折，意为“而；然而”。此时，while一般位于句中 （While作并列连词用，意思为“而，然而”，表对比；而but表转折） Some people waste food while others haven't enough. 有些人浪费粮食,然而有些人却吃不饱。 You like sports, while I prefer music. 你喜欢体育,而我更喜欢音乐。 4.表示条件，意为“只要”， 相当于as long as。while可位于句首，也可位于句中 There will be life while there is water and air. 只要有空气和水，就有生命。 While there is life, there is hope. 留得生命在，不怕没希望。
yet
adv. 还；已经 conj. 但是；然而
副词 adv.
转折关系
1.还, 尚, 仍然 He can't drive yet. 连接词 conj. 他还不会开车。 The job is not yet finished. 然而, 但是 这工作还没做完。 She's a funny girl, yet you can't help liking her. Go at once while there is yet time. 她很滑稽, 但你禁不住会喜欢她。 趁着还有时间, 马上去。 I have yet to find out the truth. The boy is so fat and yet he runs very fast. 我还得去了解真相。 这男孩很胖, 但却跑得很快。 2.已经 Have the children come home yet? He is very old, yet he is quite strong. 孩子们已经回家了吗? 他虽然年纪很大了, 但还很强壮。 This is the biggest lake yet discovered. 这是迄今为止所发现的最大湖。 He lives alone, yet he is happy. 3.甚至, 更 他虽然独自生活, 但却很愉快。 You must work harder yet. 你必须更努力些。 Yet much had happened between.（2002） The most severe weather is yet to come. 但中间也发生了很多。 最冷的天气还在后头呢。
其它：
转折关系
but nce is bitter, but its fruit is sweet . on the contrary I thought he was a teacher, on the contrary, he was a student.
让步关系（精选3个）
* 补充介绍“表让步意义的介词”
连接词 conj. 否则; 要不然 You'd better go now, otherwise you'll miss the train. 你最好现在就走, 要不然就赶不上火车了。
still
n. 寂静；剧照；蒸馏室 vt. 蒸馏；使…静止；使…平静下来 vi. 静止；平静；蒸馏 adj. 静止的，不动的；寂静的，平静的；不起泡的 adv. 仍然；更；静止地 conj. conj. 仍然；但是；尽管如此
转折关系
Man can create his own environment whereas animals adapt to their environment. 人能创造他自己的环境，而动物只能适应环境。
Strangely, some people find that they can smell one type of flower but not another, whereas others are sensitive to the smells of both flowers. (2005-9) 2.既然，有鉴于[用于正式公文] Whereas the following incidents have occurred… 鉴于下列事实已经发生，…
逻辑关系
—— 考研完型新题型专题
Alex
句间逻辑词汇：连词，表逻辑关系的副词，起连接作用的短语。
转折关系（精选6个）
however
adv. 无论如何；不管怎样 conj. 然而；可是
转折关系
基本用法，类同but： However, a well-balanced diet will usually meet all the body’s vitamin meets.(1996) However, the typical teenage lifestyle is already filled with so much competition（2003） However, it has been found that even people insensitive to a certain smell…(2005) 插入语用法，值得关注： This view, however, is generally thought to be wrong. (1998-47) It is generally recognized, however, that the introduction of the computer radically changed the process. (2002-29) All theories, however, are tentative and subject to criticism.(2004) On the issue of freedom of religion and the position of the church, however, there was less agreement among the leadership. (2007-9) Even he, however, might tremble at the thought of what he is about to do.(2008) These facts, however, have previously been thought unrelated. (2008-14)
adv. 还，尚：
转折关系
可是，但是，然而，虽然这样： It was futile, still they fought. 明知不可能获胜，他们还是进行了拼争。
Is he still here?他还在这儿吗? 仍，至今还；迄今为止： A day before departure we were still lacking an itinerary. 就在临行的前一天，我们还没制定出旅行计划。 仍然，依然： …when England was still a completely agricultural country(1998) 还要，甚至要： still more complaints更多的抱怨 still greater riches更大的财富 还有： Tomorrow is still to come.明天过后总还有明天。 静静地；静止不动地： Stand still!