条件状语从句是英语语法中的一种从句，用于表达某种条件下的情况。下面是40个常用的条件状语从句例句，希望可以帮助大家加深对英语语法的理解和应用。
- If it rains tomorrow, we will stay at home.
- Unless you finish your homework, you cannot go out to play.
- Provided (that) you are careful, you won't have any problems.
- As long as you study hard, you will pass the exam.
- In case of emergency, please call 911.
- Without your help, I couldn't have finished the project.
- If I were you, I would ask for a raise.
- Unless he changes his mind, we cannot go on the trip.
- Provided (that) we have enough money, we will buy a new car.
- As long as the weather is good, we can go for a picnic.
- In case you forget, I will remind you.
- Without your support, I would have given up.
- If I had known, I would have come earlier.
- Unless you hurry up, we will miss the train.
- Provided (that) it is not too expensive, I will buy it.
- As long as you promise to be careful, I will let you drive my car.
- In case you need anything, just let me know.
- Without your permission, I cannot go to the party.
- If he comes early, we can finish the work on time.
- Unless we work together, we cannot achieve our goal.
- Provided (that) we have enough time, we can visit all the tourist attractions.
- As long as you follow the rules, you won't get into trouble.
- In case of a fire, use the fire extinguisher.
- Without your help, I wouldn't have passed the exam.
- If I had enough money, I would go on a world tour.
- Unless you pay the bill, we cannot leave the restaurant.
- Provided (that) you finish your work on time, you can go home early.
- As long as you keep practicing, you will improve your English.
- In case you lose your keys, I have a spare set.
- Without your advice, I would have made a big mistake.
- If he had listened to me, he wouldn't have failed.
- Unless we take action now, it will be too late.
- Provided (that) the weather is good, we can go to the beach.
- As long as we have each other, we can overcome any difficulty.
- In case of a power outage, use the generator.
- Without your support, I wouldn't have been able to start my own business.
- If we had arrived earlier, we could have found a better seat.
- Unless you have a valid passport, you cannot travel abroad.
- Provided (that) you are well-prepared, you can give a great presentation.
- As long as you are honest, you won't get into trouble.
以上就是40个常用的条件状语从句例句，需要注意的是，条件状语从句中的动词要使用虚拟语气的形式。希望这些例句对大家学习英语语法有所帮助！
