在书面语或一些口语中,条件从句可以不用连接词if,而把谓语里的过去式were、had、should移到主语之前,构成部分倒装,但这种部分倒装里的助动词是不能用缩写形式的,如:
Wereyouinmyposition,youwoulddothesame.
Hadhebeeninyourposition,he'dprobablyhavedonethesame.
Shouldtheyattackus,we'llwipethemoutcompletely.
Iwillgo,shoulditbenecessary.
在虚拟时态中,可移到主语之前的,除了were、had、should外,偶尔还有did、would、could等助动词和情态动词.如:
Thereareotherarticles,towhich,didtimepermit,wemightdrawattention.
Wouldspaceallow,Iwouldliketoquotethenoticeinfull.
"Joyce!"andJoycewouldhavebeenastonishedcouldshehaveheardhisvoice.
DidIhavetime,Iwouldcome.
你给出的句子,正确的说法是Wereitnotfortheirsupport,wewouldbeinadifficultsituation.意思是:“没有了他们的支持,我们就处于很困难的境地了.”这里的were与否定字not不可以缩写.希望我能帮助你解疑释惑.