You would not have failed if___(按照我的指令去做)

題目：

You would not have failed if___(按照我的指令去做)
you had followed my instructions 或者you had followed my orders
我知道前面是虛擬語態,後面爲什麼要用had呢?後面 instructions 和orders,爲什麼標準答案都是複數?單數可以嗎?

解答：

其實真正的虛擬語氣是後面那句話,如果你有按照我說的去做（事實上並沒有）,you would have not failed 只是這一虛擬語氣的結果,這也是這道題目的考點,至於後面的單複數不必強求,根據語境也無法判斷.