Had I worn my overcoat,I ________ have caught cold.(Unit7-12)为什么用couldn't不用won't?请分析一下句型或语法.那这里用了特殊句型吗？换成正常语序并补全该句，应是怎样的呢？

if I had worn my overcoat,I_____coldA:willnot have caughtB:coldnot have caughtC:willnot catchD:wouldnot catch My socks have worn my football socks are ___ out.how long have you __ them A worn,bought B wearing,had c Wearing bought D worn had My shoes _____ .I went out for a new pair.A.is worn out B.wore out C.were worn off D.were worn out i had my if i had my -Have you ever been involved in an mobile accident?-Only once.My car slid on a rainy night and went off the road.Fortunately I _my seatbelt.A.was wearingB.woreC.have wornD.had worn My clothes are worn out.I'll have new ones made的英文翻译 My ---- are worn out,and I'd like to buy new ones.(sport clothes) 1.I have worn out my shoes,so Iwant to buy a new() I had broken my leg . if i had it my You were not at home last Sunday morning.Right?Yes.My shoes ____ .I went out for a new pair.A.is worn out B .wore out C.were worn off D.were worn out Worn worn 请问这句填什么I have worn out my shoes ,I want to buy a new -----(是填Pair还是Ones 【急!My shoes are worn out.I will have to buy _____________.My shoes are worn out.I will have to buy _____________.A.a new pair B.a new one C.new oneD.another one -My shoes are worn out.-___________________.