as if ,even if有什么区别和用法

as if ,even if有什么区别和用法 as if 和even if有什么区别 as if 和as though even if和even though 有什么区别吗 even if和even though的用法有哪样区别 as if 和 if 有什么区别? although、even if和even though有什么区别 as和as if有什么区别? even if ,even though 有什么区别? even ,even if有什么区别 as if 和even if和as if在意思用法上有什么区别? 虚拟语气中,as if/as though,或even if/even though的用法有哪些?