前一段时间，美国英文学院（American Academy of English,简称AAE）为大家分享了“因果关系连接词”的英语学习干货，今天AAE将为大家分享“转折关系+条件关系的英语连接词”，希望这些干货能帮助大家学好英语！
转折关系
but （连词）但是；然而；尽管如此；表示歉意时说
例句：
I called after you, but you did not hear.
我在后面叫你，但是你没有听到。
however（副词）然而；不过；无论如何
例句：
However, he underestimates the scale of the problem.
然而，他低估了问题的严重性。
yet （连词）但是，然而
例句：
There are a lot of difficulties in front of us, yet we still have faith in victory.
虽然面临许多困难，然而我们对胜利仍充满信心。
although （连词）虽然；尽管；即使
例句：
Although Stewart did not get on the scoresheet, he was directly involved in both goals.
尽管斯图尔特没有进球，但两个进球他都直接参与了助攻。
though （连词）虽然；尽管；即使；不过
例句：
Though they all live nearby, I lost contact with them really quickly.
虽然他们都住在附近，但我很快与他们失去了联系。
even though 尽管；即使
例句：
Even though at their last gasp, the enemies will still put up their deathbed struggle.
即使是奄奄一息，敌人也还是要作垂死挣扎的。
even if 即使；尽管
例句：
Even if we achieve great success in our work, we should not be conceited.
即使我们在工作中取得了很大的成绩，也不应该自满。
even （副词）甚至；即使；愈加；甚至可以说
例句：
I've had enough — there are limits even for the patience of a saint!
我已经受够了——即使是圣人忍耐也是有限的！
nevertheless （副词）尽管如此；不过；然而
例句：
The news may be unexpected; nevertheless, it is true.
这消息可能是出乎意料的，然而是真实的。
despite （介词）即使；尽管
例句：
Despite everything, Elizabeth's human side keeps breaking through.
不管怎样，伊丽莎白还是不断显露出其作为普通人的一面。
in spite of 尽管；不管；不顾
例句：
He was there on the stroke in spite of the rain.
尽管下雨，他还是准时到了。
regardless of不管；不顾；不理会
例句：
Regardless of whether he is right or wrong, we have to abide by his decisions.
不管他正确与否，我们都得服从他的决定。
anyway （副词）尽管；即使这样
例句：
He said he didn't know much about computers, but he'd try and help us anyway.
他说尽管他不太懂电脑，但不管怎样他要试着帮助我们。
anyhow （副词）无论如何；不管怎样
例句：
I wasn't qualified to apply for the job really but I got it anyhow.
实际上我并不具备申请这份工作的资格，但不管怎样，我还是被录用了。
unfortunately （副词）不幸地；遗憾地；可惜
例句：
This man may have killed others, but unfortunately, we have no firm evidence.
这名男子可能还杀害过其他人，只可惜我们没有确凿的证据。
surprisingly （副词）令人惊讶地；出乎意料地
例句：
Surprisingly, she didn't feel nervous or regretful about her actions.
令人惊讶的是，她并没有对她的行为感到紧张或后悔。
条件关系
if （连词）如果；倘若
例句：
I should look out if I were you!
如果我是你，我会小心的。
only if （连词）只有
例句：
The lawyer is paid only if he wins.
只有官司赢了才支付律师费。
if only 只要
例句：
There had to be an answer — he was sure he could tease it out if only he had time.
unless （连词）除非
例句：
Leave your checkbook and credit cards at home unless you know you will need them.
除非确实需要用到支票簿和信用卡，否则别带在身上。
lest （连词）以免
例句：
He took his umbrella lest it should rain.
他带了雨伞以免下雨。
otherwise （副词）否则
例句：
Make a note of the questions you want to ask. You will invariably forget some of them otherwise.
把想提的问题记下来，否则总是会漏掉其中的一些。
as soon as 一旦；一……就……
例句：
He got married as soon as he graduated.
他一毕业就结婚了。
as long as （连词）只要
例句：
As long as I deliver the goods, my boss is very happy.
只要我做好本职工作，我的老板就很高兴。
in case 以防万一
例句：
Leave your key with a neighbor in case you lock yourself out one day.
给邻居留把钥匙，以防有朝一日把自己反锁在外面。
suppose that 假设
例句：
The policy is perfectly clear, and I see no reason to suppose that it isn't working.
这项政策非常清楚明了，我没有理由假设它不会奏效。
when （连词）当…时
例句：
Can you cover my phone calls when I'm out?
whenever （连词）在任何…的时候；每当
例句：
I was disappointed whenever the cook found fault with my work.
每当厨师挑剔我干的活儿时，我都非常沮丧。
in this sense 在这种意义上
例句：
In this sense, education and health are a sisterhood.
从这个意义上来说，教育和卫生属于姐妹关系。
once... （连词）一旦
例句：
Once I had had a baby, I had the perfect excuse to stay at home.
一旦有了宝宝，我就完全有理由在家里待着了。
if possible 如果可能的话
例句：
Red wines should be allowed to 'breathe' if possible before drinking.
如果可能的话，在饮用红酒前应该先开瓶透透气。
if necessary 如果必要的话
例句：
If necessary, the patient can then visit his doctor for further advice.
如有必要，病人可以上门咨询自己的医生以得到更多的建议。
if so 如果这样
例句：
Do you have a knack for coming up with ideas? If so, we would love to hear from you.
你有什么能想出好点子的诀窍吗？如果有，我们很愿意收到你的来信。
if not all 如果不是全部
例句：
Technical skill is a fundamental basis for most, if not all, great art.
技巧即使不是所有伟大艺术、也是其中大多数的根本基础。
if anything 如果有的话
例句：
Living together didn't harm our friendship. If anything it strengthened it.
在一起住并没有损害我们的友谊。要说真有什么的话，它反而巩固了我们的友谊。