You should go to bed early if you want to be healthy.（如果你想保持健康，就应该早点睡觉。）

We should protect the environment and save the planet.（我们应该保护环境，拯救地球。）

Students should listen carefully in class to learn better.（学生们应该在课堂上认真听讲以便更好地学习。）

He should exercise regularly to keep fit.（他应该经常锻炼来保持身体健康。）

She should eat more fruits and vegetables for a balanced diet.（她应该多吃水果和蔬菜以保持均衡饮食。）

They should arrive at the airport two hours before the flight.（他们应该在航班起飞前两小时到达机场。）

You should apologize to him for what you said.（你应该为你所说的话向他道歉。）

We should respect the elderly and help them when needed.（我们应该尊重老人，并在需要时帮助他们。）

Children should brush their teeth twice a day.（孩子们应该每天刷两次牙。）

You should wear a seatbelt when driving a car.（开车时你应该系好安全带。）

He should study harder if he wants to pass the exam.（如果他想通过考试，就应该更努力学习。）

She should take care of herself when she's alone.（她独自生活时应该照顾好自己。）

We should recycle waste to reduce pollution.（我们应该回收垃圾以减少污染。）

They should plan their trip in advance to avoid problems.（他们应该提前规划旅行以避免问题。）

You should be honest with your parents about your grades.（你应该如实向父母汇报你的成绩。）

He should give up smoking for his own health.（为了他自己的健康，他应该戒烟。）

She should practice speaking English every day to improve it.（她应该每天练习说英语来提高水平。）

We should be kind to animals and not hurt them.（我们应该善待动物，不要伤害它们。）

You should turn off the lights when you leave the room.（离开房间时你应该关灯。）

They should communicate more often to solve their differences.（他们应该更经常地沟通以解决分歧。

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