“Even if” is usually used to talk about what you will do at a future time despite something which might go against your plan. For Example: 1. Even if my girlfriend is at the party, I’m going to go. 2. Even if my company offers me a good salary, I won’t take it. “Even though” can be used with various verb tenses and has the same meaning as the word “although”. For Example: 1. Even though I was invited to the party, I didn’t go. 2. I will work overtime this weekend even though I don’t want to

“Even though” is the English equivalent of “虽然” or “尽管” while "even if" is the same as "即使." 1) Even though I'm hungry, I will not eat. 2) Even if I'm hungry, I will not eat. In sentence 1, I am already hungry, but I will not eat. In sentence 2, I'm not hungry now, but if I'm hungry, I will choose not to eat. When you use "even though", a situation has already happened, whereas in "even if" the situation has not happened yet, it's a supposition(假设), but if it happens, you will choose not to eat. In using "even if", the situation is usually a little more exaggerated to proof your point, for example: Even if I die of hunger, my lips shall not touch a grain of rice! So the Chinese equivalent can be: 1) 尽管我肚子哦，我还是不要吃东西。2) 即使我哦死／哦得站不起来，我还是不要吃任何东西。 Hope this helps.

"Even if" means "whether or not" and has to do with the conditions that may apply. "Even if" is used as a conjunction. On the other hand, "Even though" means "despite the fact that" and is a more emphatic version of though and although. As an example, you could say "Even if I had the time, I wouldn't write a book" but not "Even though I had the time, I wouldn't write a book". The first one means that you might have time, but even if you did, you wouldn't, but the second means that you did have time and chose not to. I hope this answered your question.