请教下面句子是对过去的虚拟还是对现在的虚拟?
He talks as if he had known John since boyhood.
请问这句话中,虚拟语态是对过去的事情进行虚拟还是对现在的事情进行虚拟呢?
现在有两种说法:
对过去的虚拟;
对现在hsa know John since boyhood的虚拟。