I have to get up early tomorrow to catch the first bus.（我明天必须早起去赶头班车。）

She has to finish her homework before watching TV.（她必须在看电视之前完成作业。）

They have to work overtime this weekend to meet the deadline.（他们这个周末必须加班以赶上截止日期。）

He has to take care of his sick mother at home.（他必须在家照顾生病的母亲。）

We have to wear uniforms at school.（我们在学校必须穿校服。）

You have to be quiet in the library.（你在图书馆必须保持安静。）

The students have to pass the exam to move to the next grade.（学生们必须通过考试才能升入下一年级。）

My father has to drive to work every day.（我父亲每天都必须开车去上班。）

They have to clean the classroom after school.（他们放学后必须打扫教室。）

She has to practice the piano for two hours every day.（她每天必须练习两个小时的钢琴。）

I have to go shopping because there is no food at home.（我必须去购物，因为家里没有食物了。）

He has to attend a meeting this afternoon.（他今天下午必须参加一个会议。）

We have to follow the traffic rules when we cross the road.（我们过马路时必须遵守交通规则。）

You have to make your bed every morning.（你每天早上必须整理床铺。）

The workers have to build the house according to the plan.（工人们必须按照计划建造房子。）

She has to wash her clothes by herself.（她必须自己洗衣服。）

They have to study hard to improve their grades.（他们必须努力学习以提高成绩。）

I have to call my friend to tell him the good news.（我必须给我的朋友打电话告诉他这个好消息。）

He has to fix his bike because it's broken.（他必须修理他的自行车，因为它坏了。）

We have to save water to protect our environment.（我们必须节约用水来保护环境。）