When the rain stopped, we went out for a walk.（当雨停了的时候，我们出去散步了。）

While I was doing my homework, my mother was cooking dinner.（我在做作业的时候，妈妈在做晚饭。）

As soon as he arrives, we will start the meeting.（他一到，我们就开始开会。）

After she finished reading the book, she wrote a review.（她读完这本书后，写了一篇书评。）

Before you leave, make sure you turn off all the lights.（你离开之前，确保关掉所有的灯。）

Since it's raining heavily, we'd better stay at home.（因为雨下得很大，我们最好待在家里。）

Because he was ill, he didn't come to school today.（因为他生病了，他今天没来上学。）

Although it was cold, he still went swimming in the river.（尽管天气很冷，他仍然去河里游泳了。）

Even though she faced many difficulties, she never gave up.（即使她面临很多困难，她也从未放弃。）

If it doesn't rain tomorrow, we will go on a picnic.（如果明天不下雨，我们就去野餐。）

Unless you work hard, you won't pass the exam.（除非你努力学习，否则你不会通过考试。）

In case it rains, take an umbrella with you.（以防下雨，带上一把伞。）

So that he could catch the bus, he got up early.（为了能赶上公共汽车，他早早地起床了。）

He studied hard in order that he could get good grades.（他努力学习以便能取得好成绩。）

The more you practice, the better you will be at English.（你练习得越多，你的英语就会越好。）

As long as you believe in yourself, you can achieve your dreams.（只要你相信自己，你就能实现你的梦想。）

Every time I see her, she always has a big smile on her face.（每次我见到她，她脸上总是挂着灿烂的笑容。）

Wherever you go, I will follow you.（无论你去哪里，我都会跟着你。）

Whenever you need help, just call me.（无论你什么时候需要帮助，尽管给我打电话。）

The moment he saw the accident, he called the police.（他一看到事故，就报了警。）