If I should , Imperative Sentence.

　　結(jié)構(gòu)︰If I+should +祈使語氣

　　說明︰代替，增加了條件的不確定性。本句型常用在想禮貌地提出要求或建議，或者想圓通地告訴他人該做什么事的場(chǎng)合。用 should 起始句子即可不用 if 而表示條件。這種用法比較正式，常用于諸如公函之中，而不用于日常會(huì)話。

　　If you should see him, please give him my regards.

　　如果你見到他，請(qǐng)代我向他致意。

　　Should you see him, please give him my regards.

　　如果你見到他，請(qǐng)代我向他致意。

　　If you should happen to see him, please give him my regards.

　　如果你萬一見到他，請(qǐng)代我向他致意。

　　Should you happen to see him, please give him my regards.

　　如果你萬一見到他，請(qǐng)代我向他致意。

　　If you should write to her, send her my love.

　　如果你給她寫信，請(qǐng)代我向她問候。

　　Should you not wish our agent to call, please let us know.

　　你若不希望我們的代理人去造訪，請(qǐng)告之。

　　Should you be interested in our offer, please contact us.

　　你若對(duì)我們的報(bào)價(jià)感興趣，請(qǐng)與我們聯(lián)系。

　　If I should , Imperative Sentence.

　　結(jié)構(gòu)︰If I+should +祈使語氣

　　說明︰代替，增加了條件的不確定性。本句型常用在想禮貌地提出要求或建議，或者想圓通地告訴他人該做什么事的場(chǎng)合。用 should 起始句子即可不用 if 而表示條件。這種用法比較正式，常用于諸如公函之中，而不用于日常會(huì)話。

　　If you should see him, please give him my regards.

　　如果你見到他，請(qǐng)代我向他致意。

　　Should you see him, please give him my regards.

　　如果你見到他，請(qǐng)代我向他致意。

　　If you should happen to see him, please give him my regards.

　　如果你萬一見到他，請(qǐng)代我向他致意。

　　Should you happen to see him, please give him my regards.

　　如果你萬一見到他，請(qǐng)代我向他致意。

　　If you should write to her, send her my love.

　　如果你給她寫信，請(qǐng)代我向她問候。

　　Should you not wish our agent to call, please let us know.

　　你若不希望我們的代理人去造訪，請(qǐng)告之。

　　Should you be interested in our offer, please contact us.

　　你若對(duì)我們的報(bào)價(jià)感興趣，請(qǐng)與我們聯(lián)系。