由两个介词构成的双重介词: till after, from behind, except in We stayed there till after the sunset He picked up the gun from behind the counter The weather has been fine except in the north由两个介词构成的双重介词： ➢ till after, from behind, except in … ➢ We stayed there till after the sunset. ➢ He picked up the gun from behind the counter. ➢ The weather has been fine except in the north