5、opleSureChange!Iusedtobeafraidofthedark.肯定句否定句I didn’tuse to be afraid of the dark.一般疑问句Didyouusetobeafraidofthedark?Yes,Idid./No,Ididn’t.反意疑问句Youusedtobeafraidofthedark,didn’tyou?Yes,Idid./No,Ididn’t.Sb.usedto+be/do…Sb.didn’tusetobe/do…Didsb.usetobe/do…?--Yes,sb.did.No,sb.didn’t.--Yes,s