初二英语He had to sleep in bed,( ）

B形容词可以做伴随状语的用法,例如：She returned to work,unhappy．The thief hid himself in the corner,afraid of being caught。小偷躲在角落里,怕被人抓住。We watched the houses being destroyed by the storm,helpless。看着房子正在被暴风雨摧毁,无能为力。