Even though is used to express a fact, something that is real or true.
Even though means 'despite/in spite of' the fact'.
It is more emphatic than 'though' or although'.
- Even though John is rich, he lives in a small house.
(John is rich, but despite having money he lives in a small house.)
- Even though she likes animals, Mary doesn't want a dog.
(In spite of the fact that she likes animals, Mary doesn't want a dog.)
- Even though the building was damaged, business went on as usual.
(The building was damaged, but despite that business went on as usual.)
- Even though I washed it several times, I couldn't get rid of the stain.
(I couldn't get rid of the stain despite washing it several times.)
Even if is used in a supposition or hypothesis.
It refers to an imaginary or unreal situation
- Even if Caroline earned a big salary, she would not buy a fast car.
(Caroline doesn't like fast cars. It is not because of the price that she won't buy one.)
- Even if I had time and money, I still wouldn't go on a cruise.
(It's not because I have no time or no money that I won't go on a cruise.
I have other reasons for not going.)
- I wouldn't wear that dress even if I got it for free!
(Imagine getting that dress for nothing. I still wouldn't wear it!)