even if = although = while = 即使 = 縱使
even though = although = whereas = 即使 = 雖然
though = although = 儘管 = 雖然
Though he is rich, his life is not happy.
even if和even though的意思比較接近，但語氣不太一樣，如果想看英文原文講解的話，請點選參考資料的網址。
even though 的意思是「儘管、雖然」（despite the fact that），是though和although的加強版。
even if 的意思是「whether or not （縱使）」，後面常接應該要如何處理事件，文句的意思有點類似無論這件事有沒有發生，都應該如何如何。
Even though he lost his job as Arts Minister, he continued to serve in the government.
Even if he loses his job as Arts Minister, I think he'll continue to serve in the government.
even if 還有一種用法令我印象比較深刻，他可以不用放在句首，而是在句中使語氣有點轉折。
Even though the injury was serious, she decided to carry on playing. It was an important match.
I know she'll want to carry on playing, even if she gets injured. It's an important match.