as if,even though,even since,的意思?

even if;even though;as if;as though分别是什么意思? though,although,as,even if,even though有何区别? 英语题：even though, even if, as though, as if 的区别,详解~~ 谢谢啦 as if 和as though even if和even though 有什么区别吗 even though、even if的区别和as though、as if的区别 as if,even though,even since,的意思? 关于一些词组的区别?even if,even though,as if ,even ,as though 的意思和区别? even if,even though,though的区别 请问 as if与as though ,even if与even though,so far as 与 as long as各有什么区别? even though as though even since 三个even though as though even since 区别if,unless,as long as,once,although,though,even if,whenever 1.even if 2.ever since 3.as if 4.as though although,though,even if hough的区别 as if only if even though这几个词组完型常考且每次必错 as if just as just after even though 分别什么意思 even though 与 even if的区别 even though与even if 举例 1.There are a lot of spelling mistakes; ________ it’s quite a good essay.A.as though B.even though C.even if D.even so