be
be supposed to do的情景用法？
supposed to do的情景用法？
be supposed to do sth被期望做某事，应该做某事。
法
①be supposed to... 意为“应该……”；“被期望……”，它可以用来表示劝告、建议、义务、责任等，相当于情态动词should。
例：Everyone is supposed to wear a seat-belt in the car.每个人在汽车里都应该系安全带。
Teachers are supposed to treat all the students alike.老师应该对所有的学生一视同仁。
He is supposed to have arrived an hour ago.他应该一小时前就到了。
②be supposed to... 的否定结构为be not supposed to...,它常用于口语中，意为“不被许可；不应当”。
例：She was not supposed to be angry about that.她本不该为那件事而生气的。
You are not supposed to smoke on the bus.你不应该在公共汽车上吸烟。
You are not supposed to take photos in the hall. 你可不能在大厅里拍照.
seatbelt是什么意思及反义词？
seatbelt 英 [si:tbelt] 美 n. 座位安全带 短语 Seatbelt Reminder 安全带提醒装置 seatbelt http 飞机 Fasten seatbelt 系紧安全带 系安全
require somebody to do something造句？
require somebody to do sth.的意思是“要求某人做某事”。例如：
The school requires students to go to school in advance.学校要求学生提前到学校。
My teacher reauired me to write an article yesterday.昨天我的老师要求我写篇文章。
Law requires you to wear seat belts. 法律规定你要系安全带.