though

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++though1 /ðəʊ $ ðoʊ/ ●●● S1 W1 conjunction  1  ALTHOUGHused to introduce a statement that makes the main statement coming after it seem surprising, unlikely, or unexpected 虽然，尽管 SYN although Though she’s almost 40, she still plans to compete. 尽管已经快40岁了，她仍然打算参加比赛。 Pascal went ahead with the experiment even though he knew it was dangerous. 虽然帕斯卡知道这个试验很危险，但他仍然进行下去。though old/tired etc The rooms, though small, were pleasant and airy. 这些房间虽小，但舒适又通风。old though it is/tired though he was etc Strange though it may seem, I like housework. 说来也许奇怪，但我喜欢做家务。2  BUTused like ‘but’ to add a fact or opinion that makes what you have just said seem less definite, less important etc 可是，不过，然而 I thought he’d been drinking, though I wasn’t completely sure. 我觉得他喝了酒，不过不是十分肯定。 The offenders were dealt with firmly though fairly. 这些违法者受到了严厉但公正的处罚。3  as though a) in a way that makes you think something is true 好像〔指某种情形使你认为某事属实〕 SYN as if It looks as though everyone else has gone home. 看起来好像其他所有人都回家了。 b) in a way that might make you think something was true, although you know it is not true 好像，仿佛〔指某种情形也许会让你有种感觉，但其实你知道事实并非如此〕 SYN as if She stared at me as though I were a complete stranger. 她盯着我看，好像我完全是个陌生人。

Examples from the Corpus

though• I guess he'd been drinking, though I wasn't completely sure of that.• Though she was no more than twenty-two, she was already a highly successful businesswoman.though old/tired etc• His jeans and checked shirt, though old and well worn, looked clean and of good quality.• The latest one, though older, looks much younger than her age.• Even though older viewers do tend to have more money, they are less easily swayed by television commercials.though2 ●●● S1 adverb  spokenBUT used after adding a fact, opinion, or question which seems surprising after what you have just said, or which makes what you have just said seem less true 可是，不过，然而 Two heart attacks in a year. It hasn’t stopped him smoking, though. 一年里心脏病发作了两次，可是那也没让他把烟戒掉。 It sounds like a lot of fun. Isn’t it rather risky though? 听上去很有趣。可是这不是也很危险吗？

Examples from the Corpus

though• George did say one nice thing, though.• I think she's Swiss. I'm not sure though.• First time theme of picture excited me though.• I knew it was a variety of good news, though.• I should steer clear of the throw-it-all-in-a-pot philosophy, though.• She wasn't in the least bit hungry though.• There is this terrible guilt, though.Origin though2 (1200-1300) Old Norse tho

though1 conjunctionthough2 adverbChinese  

to used Corpus makes a introduce statement that

though

I

though¹ S1 W1 /ðəʊ $ ðoʊ/ conjunction
1. used to introduce a statement that makes the main statement coming after it seem surprising, unlikely, or unexpected
   SYN  although:
    Though she’s almost 40, she still plans to compete.
    Pascal went ahead with the experiment even though he knew it was dangerous.
    though old/tired etc
    The rooms, though small, were pleasant and airy.
    old though it is/tired though he was etc
    Strange though it may seem, I like housework.
2. used like ‘but’ to add a fact or opinion that makes what you have just said seem less definite, less important etc:
    I thought he’d been drinking, though I wasn’t completely sure.
    The offenders were dealt with firmly though fairly.
3. as though
  a. in a way that makes you think something is true
   SYN  as if:
    It looks as though everyone else has gone home.
  b. in a way that might make you think something was true, although you know it is not true
   SYN  as if:
    She stared at me as though I were a complete stranger.

II

though² S1 adverbspoken used after adding a fact, opinion, or question which seems surprising after what you have just said, or which makes what you have just said seem less true:
    Two heart attacks in a year. It hasn’t stopped him smoking, though.
    It sounds like a lot of fun. Isn’t it rather risky though?