前一段時間，美國英文學院（American Academy of English,簡稱AAE）為大家分享了「因果關係連接詞」的英語學習乾貨，今天AAE將為大家分享「轉折關係+條件關係的英語連接詞」，希望這些乾貨能幫助大家學好英語！
轉折關係
but （連詞）但是；然而；儘管如此；表示歉意時說
例句：
I called after you, but you did not hear.
我在後面叫你，但是你沒有聽到。
however（副詞）然而；不過；無論如何
例句：
However, he underestimates the scale of the problem.
然而，他低估了問題的嚴重性。
yet （連詞）但是，然而
例句：
There are a lot of difficulties in front of us, yet we still have faith in victory.
雖然面臨許多困難，然而我們對勝利仍充滿信心。
although （連詞）雖然；儘管；即使
例句：
Although Stewart did not get on the scoresheet, he was directly involved in both goals.
儘管斯圖爾特沒有進球，但兩個進球他都直接參與了助攻。
though （連詞）雖然；儘管；即使；不過
例句：
Though they all live nearby, I lost contact with them really quickly.
雖然他們都住在附近，但我很快與他們失去了聯繫。
even though 儘管；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，敵人也還是要作垂死掙扎的。
even if 即使；儘管
例句：
Even if we achieve great success in our work, we should not be conceited.
即使我們在工作中取得了很大的成績，也不應該自滿。
even （副詞）甚至；即使；愈加；甚至可以說
例句：
I've had enough — there are limits even for the patience of a saint!
我已經受夠了——即使是聖人忍耐也是有限的！
nevertheless （副詞）儘管如此；不過；然而
例句：
The news may be unexpected; nevertheless, it is true.
這消息可能是出乎意料的，然而是真實的。
despite （介詞）即使；儘管
例句：
Despite everything, Elizabeth's human side keeps breaking through.
不管怎樣，伊莉莎白還是不斷顯露出其作為普通人的一面。
in spite of 儘管；不管；不顧
例句：
He was there on the stroke in spite of the rain.
儘管下雨，他還是準時到了。
regardless of不管；不顧；不理會
例句：
Regardless of whether he is right or wrong, we have to abide by his decisions.
不管他正確與否，我們都得服從他的決定。
anyway （副詞）儘管；即使這樣
例句：
He said he didn't know much about computers, but he'd try and help us anyway.
他說儘管他不太懂電腦，但不管怎樣他要試著幫助我們。
anyhow （副詞）無論如何；不管怎樣
例句：
I wasn't qualified to apply for the job really but I got it anyhow.
實際上我並不具備申請這份工作的資格，但不管怎樣，我還是被錄用了。
unfortunately （副詞）不幸地；遺憾地；可惜
例句：
This man may have killed others, but unfortunately, we have no firm evidence.
這名男子可能還殺害過其他人，只可惜我們沒有確鑿的證據。
surprisingly （副詞）令人驚訝地；出乎意料地
例句：
Surprisingly, she didn't feel nervous or regretful about her actions.
令人驚訝的是，她並沒有對她的行為感到緊張或後悔。
條件關係
if （連詞）如果；倘若
例句：
I should look out if I were you!
如果我是你，我會小心的。
only if （連詞）只有
例句：
The lawyer is paid only if he wins.
只有官司贏了才支付律師費。
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.
一定會有答案——他肯定，只要他有時間就一定能弄個清楚。
unless （連詞）除非
例句：
Leave your checkbook and credit cards at home unless you know you will need them.
除非確實需要用到支票簿和信用卡，否則別帶在身上。
lest （連詞）以免
例句：
He took his umbrella lest it should rain.
他帶了雨傘以免下雨。
otherwise （副詞）否則
例句：
Make a note of the questions you want to ask. You will invariably forget some of them otherwise.
把想提的問題記下來，否則總是會漏掉其中的一些。
as soon as 一旦；一……就……
例句：
He got married as soon as he graduated.
他一畢業就結婚了。
as long as （連詞）只要
例句：
As long as I deliver the goods, my boss is very happy.
只要我做好本職工作，我的老闆就很高興。
in case 以防萬一
例句：
Leave your key with a neighbor in case you lock yourself out one day.
給鄰居留把鑰匙，以防有朝一日把自己反鎖在外面。
suppose that 假設
例句：
The policy is perfectly clear, and I see no reason to suppose that it isn't working.
這項政策非常清楚明了，我沒有理由假設它不會奏效。
when （連詞）當…時
例句：
Can you cover my phone calls when I'm out?
我不在時請幫我接電話好嗎？
whenever （連詞）在任何…的時候；每當
例句：
I was disappointed whenever the cook found fault with my work.
每當廚師挑剔我幹的活兒時，我都非常沮喪。
in this sense 在這種意義上
例句：
In this sense, education and health are a sisterhood.
從這個意義上來說，教育和衛生屬於姐妹關係。
once... （連詞）一旦
例句：
Once I had had a baby, I had the perfect excuse to stay at home.
一旦有了寶寶，我就完全有理由在家裡待著了。
if possible 如果可能的話
例句：
Red wines should be allowed to 'breathe' if possible before drinking.
如果可能的話，在飲用紅酒前應該先開瓶透透氣。
if necessary 如果必要的話
例句：
If necessary, the patient can then visit his doctor for further advice.
如有必要，病人可以上門諮詢自己的醫生以得到更多的建議。
if so 如果這樣
例句：
Do you have a knack for coming up with ideas? If so, we would love to hear from you.
你有什麼能想出好點子的訣竅嗎？如果有，我們很願意收到你的來信。
if not all 如果不是全部
例句：
Technical skill is a fundamental basis for most, if not all, great art.
技巧即使不是所有偉大藝術、也是其中大多數的根本基礎。
if anything 如果有的話
例句：
Living together didn't harm our friendship. If anything it strengthened it.
在一起住並沒有損害我們的友誼。要說真有什麼的話，它反而鞏固了我們的友誼。