三、條件句中連詞if省略

　　若條件句中的if省略，則把were， had或should置于從句主語之前，形成半倒裝句。

　　例句： The businesses are risky， but should we succeed(but if we should succeed)， we would be rich.

　　分析： 該句是由but連接的并列句，其中should we succeed是省略if的倒裝句。

　　譯文： 做生意是冒險的，但是如果我們成功了，我們就會很富裕。

　　例句： The millions of calculations involved， had they been done by hand (if they had been done...)，would have lost all practical value by the time they were finished.

　　分析： 該句是復合句，had they been done by hand是省略if的倒裝句，by the time引導狀語從句。

　　譯文： 所涉及的數百萬次運算，如果用手工進行，等到完成時，恐怕早就失去所有的實用價值了。