虽然搭配 “even though” 和 “even if” 都可以在一句话中起强调作用，但它们的意思不同。 它们分别用来引出出乎意料的事实和假设的情况。
 
Hi, I'm Phil from BBC Learning English. Today, I'm going to tell you the difference between even though and even if.
Now, we use them both for emphasis, but they don't mean the same.
We use even though to introduce something that's true, but might be a little bit unexpected. It's a bit like 'despite'. 
Even though I hate driving, I'm still going to Scotland by car. 
Even though I hate tennis, I'm still going to watch the final.
We use even if to introduce something hypothetical, so it might not be real. 
Even if it's sunny when we're in Scotland, I'm not going swimming. 
Even if you paid me, I wouldn't watch that film.
So, even though is for things that are true but unexpected, and even if is for things that are hypothetical, so they might not be real.
Even though they look the same, they are different – even if you didn't notice at first.
 
用法总结
1 “Even though” 的意思是 “即使，虽然”，它用来引出一个真实、但出乎意料的情况，类似于介词 “despite” 的用法。 
Even though I hate driving, I'm still going to Scotland.
Even though I hate tennis, I'm still going to watch the final.
 
2 “Even if” 的意思是 “即便，即使”，它用来引出一个假设的情况，所以不一定是事实。
Even if it's sunny when we're in Scotland, I'm not going swimming
Even if you paid me, I wouldn't watch that film.