【原因状语从句练习题及答案】在英语语法中，原因状语从句是用来表示主句动作发生的原因或理由的从句。常见的引导词有 because, since, as, for 等。掌握这些从句的用法，有助于我们更准确地表达逻辑关系，使语言更加地道和自然。
以下是一些关于原因状语从句的练习题及参考答案，帮助大家更好地理解和运用这一语法点。
一、选择题
1. I didn’t go to the party ______ I was sick.
A. because of
B. because
C. since
D. as
2. ______ he is tired, he can’t work any longer.
A. Because
B. Since
C. As
D. All of the above
3. She left early ______ she had to meet her friend.
A. because
B. because of
C. since
D. as
4. ______ it was raining, we stayed at home.
A. Because
B. Since
C. As
D. All of the above
5. He failed the exam ______ he didn’t study hard.
A. because
B. because of
C. since
D. as
二、填空题
1. I couldn’t attend the meeting ______ I had a prior appointment.
2. ______ she was late, the teacher was angry.
3. He didn’t come to class ______ he was ill.
4. We decided to cancel the trip ______ the weather was bad.
5. ______ you are not ready, we can’t start the meeting.
三、翻译题
将下列句子翻译成英文：
1. 因为他迟到，老师很生气。
2. 我们取消了旅行，因为天气不好。
3. 她今天没来学校，因为她生病了。
4. 既然你已经知道了真相，就不要再说谎了。
5. 由于下雨，比赛被推迟了。
四、改错题
找出下列句子中的错误并改正：
1. I stayed home because of it was raining.
2. Since he is a doctor, he knows a lot about medicine.
3. As the sun rose, the day began.
4. He didn’t pass the test because he didn’t study enough.
5. For he was busy, he couldn’t come.
五、答案解析
一、选择题答案：
1. B
2. D
3. A
4. D
5. A
二、填空题答案：
1. because
2. Because
3. because
4. because
5. Since
三、翻译题参考答案：
1. The teacher was angry because he was late.
2. We canceled the trip because the weather was bad.
3. She didn’t come to school because she was sick.
4. Since you know the truth, don’t lie anymore.
5. The game was postponed because of the rain.
四、改错题答案：
1. 错误：because of it was raining → 正确：because it was raining
2. 正确（无需修改）
3. 正确（无需修改）
4. 正确（无需修改）
5. 错误：For he was busy → 正确：Because he was busy
通过以上练习，希望大家能够更加熟练地使用原因状语从句，提高英语写作与口语表达的准确性与逻辑性。多加练习，才能真正掌握这一语法结构。
