he acts as though he did not know anything 为什么时态不一样
问题描述：
he acts as though he did not know anything 为什么时态不一样
答
as though =as if
要用虚拟语气,时态要往后面靠一个时态,对现在的虚拟,用过去式能不能详细点虚拟语气不是一句两句就能说清的，我给你举几个简单的例子比如说，要是我能飞就好了i wish i could flycan---couldi wish you were a boyare---were(虚拟语气里全用were)上面是简单的，在条件句里，分别对现在，过去，将来的虚拟，主句和从句的时态，都有固定的模式