Nowgovernmentsrealisewaterpollutionaffecteveryone,makingitdifficultforcitiestosurvive.OnlyinthiswaycanwelearnEnglish.只有这样才能学会英语.OnlythendidIunderstandwhatshemeant.只有到那时我才明白她的意思.Onlybyshoutingwasheabletomakehimselfheard.他只有叫喊才能让别人听到他.注意,在only后作状语的是从句时,从句不要用倒装,要部分倒装的是主句.如:Onlywhenitrainsdoyoufeelcool.只有下雨时才觉得凉爽一点.Onlywhenhereturnedhomedidherealizewhathadhappened.当他回到家里时,才知道出了什么事.Onlywhenwelandeddidweseehowbadlytheplanehadbeendamaged.我们只是在着陆之后才看到飞机损坏的严重程度.