were to be made是過去將來時的被動語態(tài)。be to do可以用作將來時。

例如，要是明天陶瓷燒制完成了，我們就可以提前回家過春節(jié)。但一切都不可能，因為我們還沒有準備好。

If the ceramic firing was to be made tomorrow, we could go home early for the Spring Festival. But it's impossible, because we're not ready

were to be是系表結(jié)構(gòu)的被動語態(tài)

虛擬語氣除了表達"不大可能發(fā)生的事", 也可以用于"假設"某件事，即假設的事情并沒有真正發(fā)生。

If we were to add another row to this table, it would have an identifier of 4. 這句是說，假設，我們添加一條新的記錄，那這條記錄的編號會是4(而不是刪掉的那條的編號2)

虛擬語氣在這里僅僅表達“假設"，

no one is actually going to add another row to the table, as it is just ahypothesis, or an example.

同樣，If you were to improve performance here, you could cache the string instead of re-creating it for every item in the inventory.

假設你想要在這里增加執(zhí)行效率，那你可以緩存字符串，而不要給每個庫存項目重復創(chuàng)建新的字符串。