be supposed to do的用法

作者：王嵩

来源：初中生学习指导, 2021, (03): 38-39.

<正>be supposed to do意为"应该,被期望,理应做……"。用来表示根据规定或传统习惯人们不得不做,或期待发生的事。时态、人称和句式的变化在be上体现,to为不定式符号,后接动词原形。1.be supposed to do的肯定句式,例如:Everyone is supposed to wear a seat-belt in the car.每个人在小汽车里都应该系好安全带。