Should you experience any difficult,do not hesitate to contact one of my staff members.
一、句子使用語(yǔ)氣的解釋：
這是個(gè)“虛擬條件句 + 祈使句”的復(fù)合句
1.條件虛擬語(yǔ)氣在這里是一種客套語(yǔ),即不強(qiáng)求對(duì)方非得接受 .
2.祈使句也是一種客氣,表示請(qǐng)求
二、關(guān)于條件虛擬的倒裝：
條件虛擬句?？梢杂玫寡b語(yǔ)序表示.倒裝時(shí)只要省去 if 再把助動(dòng)詞或情態(tài)動(dòng)詞提前放在主語(yǔ)前即可,如本句：
提前 should：Should you experience any difficult = If you should experience any difficult,假如你們覺(jué)得有什么難題的話,
再如：
* 提前 were：Were you to be here tomorrow,...= if you were to be here tomorrow,...假如你明天會(huì)在這里的話,...
* 提前 did：Did he come now,...= If he came now,...如果他現(xiàn)在就來(lái)的話,...
* 提前 had：Had the students finished their homework on time,...= If the students had finished their homework on time,...如果學(xué)生原來(lái)就按時(shí)完成了作業(yè)的話,...