主语 be supposed to do sth-2025-2026学年九年级英语全一册句型辨析（北师大版）

初中英语·北师大版 九年级全一册 句型辨析 寒假专版 be supposed to do sth句型辨析 初中英语·北师大版九年级全一册 句型辨析精讲 辨析-be supposed to do sth vs should do sth 维度 be supposed to do sth should do sth 核心含义 强调根据规定、习俗或他人期强调个人主观认为“应该做某 望“应该理应做某事” 事”（表义务、建议） 来源依据 外部要求（规则、约定、他人内部判断（个人责任、逻辑推 安排等) 断等) 否定形式be not supposed to do sth(不允should not do sth(不应该做) 许不该做) 例句对比 You are supposed to arrive on time for class.(学校规定应该准时上课) You should help your mom with housework.(个人认为应该帮忙做家务) 真题链接（北师大版九年级全一册期末真题） Students wear school uniforms on weekdays.It's the school rule. A.are supposed to B.should C.can 答案：A 解析：后句强调“这是学校规定”，表示外部要求，用be supposed to;should侧重个人 建议，can表能力，均不符合语境，选A。 初中英语·北师大版 九年级全一册 句型辨析 辨析二be supposed to do sth vs be expected to do sth 维度 be supposed to do sth be expected to do sth 侧重点 强调按规则或惯例“应该做”，强调他人对自己的“期望、期 语气较正式 待做某事” 对象关系 通常无明确的期望主体（隐含常隐含“某人/某方期望”的主 规则或普遍认知) 承 语气强弱 语气较强，有“必须遵守”的语气较委婉，侧重“被期待” 意味 例句对比 We are supposed to hand in homework by Friday.(按班级规定应该交作业) He is expected to win the competition by his teachers.(老师期待他赢得比赛) 真题链接（北师大版九年级全一册同步练习） -What are you supposed to do when you meet a teacher? We greet them politely.It's a school tradition. A.expected to B.are supposed to C.should 答案：B解析：问句明确用be supposed to,答句对应“学校传统”这一规则，用are supposed to: expected to需搭配期望主体，should侧重主观建议，选B。 辨析三be supposed to do sth vs have to do sth 维度 be supposed to do sth have to do sth 强制性 强调“理应做”，未做到时可能强调“必须做”，因客观条件 受指责但非绝对强制 (如规则、必要性)不得不做 否定含义be not supposed to do sth(禁 don't have to do sth(不必做) 止/不允许) 例句对比 ou are not supposed to smoke here..(禁止吸烟，违反会受批评) You have to finish the work before dinner.(客观必须完成，否则影响后续安排) 真题链接（北师大版九年级全一册月考真题） 初中英语·北师大版 九年级全一册 句型辨析 -Do wewear formal clothes to the party? -Yes,the invitation says we are supposed to. A.have to B.be supposed to C.may 答案：A解析：问句询问是否“必须”穿正装，have to表客观必要；答句用be supposed to呼应 邀请上的要求，问句用have to符合语境，选A。 综合训练 1.We follow the traffic rules when crossing the street.It's for our own safety. A.are supposed to B.should C.have to 2.-What you do at a library? -We are supposed to keep quiet.It's a public rule. A.are;supposed to B.should; C.have;to 3.Students use mobile phones in class.The school has a strict rule about it. A.aren't supposed to B.shouldn't C.don't have to 从be supposed to/should/be expected to/have to中选择合适的短语并用其正确形式完成句子 1.You wash your hands before meals.It's a good habit for health. 2.The team win the game by their coach,so they are training hard. 3.We」 finish the project before next Monday,or we will miss the deadline. 3 初中英语·北师大版 九年级全一册句型辨析 4.Passengers show their tickets when entering the station.It's a rule of the railway. 1.You should arrive at the airport two hours earlier.be supposed to) 2.We have to wear masks in public places during the pandemic.(改为否定句) 3.He is expected to get good grades by his parents.(改为一般疑间句) L.单项选择 1.A2.A3.A IL.选短语填空/完成句子 1.should 2.are expected to 3.have to 4.are supposed to ⅡL.句型转换 1.You are supposed to arrive at the airport two hours earlier. 2.We don't have to wear masks in public places during the pandemic. 3.Is he expected to get good grades by his parents? 4