·我今天在书上看见Iremeberthewholethingasifithappenedyesterday我觉得很奇怪,我觉得应该是虚拟语气,hadhappendyesterday,对么?希望能告诉我这句话怎么理解,虚拟语气怎麽用?Irememberthewholethingas

　　·我今天在书上看见Iremeberthewholethingasifithappenedyesterday

　　我觉得很奇怪,我觉得应该是虚拟语气,hadhappendyesterday,对么?希望能告诉我这句话怎么理解,虚拟语气怎麽用?

　　Irememberthewholethingasifithappenedyesterday.

　　Irememberthewholethingasifithadhappenedyesterday.

　　这两句有什么区别。