更新时间：作者：小小条
以下是中考原因状语从句的详解及双语五十例句：
原因状语从句详解
原因状语从句是用来解释某件事发生原因的状语从句。引导原因状语从句的从属连词主要有because、as、since、for、now that等。具体用法如下：
- because：意为“因为”，语气最强，主从句有直接因果关系，用来回答why的问句，从句可放主句前或后。如：I didn't go to school because I was ill.（我没去上学因为我病了。）
- as：意为“因为；由于”，语气较弱，所引导的从句表示显而易见的原因，从句通常位于主句前面。如：As it was raining, I stayed at home.（由于下雨，我待在家里。）
- since：意为“由于、既然”，侧重主句，引导的从句表示已为人知的理由，通常置于句首，语气比because弱，比as强。如：Since everybody is here, let's begin our meeting.（既然大家都到了，我们开始开会吧！）
- for：表示“因为”，不表示直接原因，表明附加或推断的理由，引导的分句只能放在所要说明的句子后面。如：He must be ill, for he is absent.（他一定是病了，因为他没来。）
- now that：意为“既然；由于”，与since同义，语气比since弱，强调已知事实，引导的从句通常放在主句前。如：Now that you are here, you can help me.（既然你在这儿，你可以帮我。）
双语五十例句
I didn't go to the party because I had too much work to do.（我没去参加派对，因为我有太多工作要做。）
As it was getting dark, we decided to go home.（因为天渐渐黑了，我们决定回家。）
Since you have finished your homework, you can watch TV for a while.（既然你已经完成了作业，你可以看一会儿电视。）
He didn't come to school because he was ill.（他没来上学因为他生病了。）
As he was very tired, he fell asleep quickly.（因为他很累，他很快就睡着了。）
Since it is Sunday today, we don't have to go to school.（既然今天是星期天，我们不用上学。）
The flowers died because there was no water.（花死了，因为没有水。）
As I was in a hurry, I forgot to take my keys.（因为我很匆忙，我忘了带钥匙。）
Since you are here, you might as well help me.（既然你在这儿，你不妨帮帮我。）
She didn't go to the park because it was too cold.（她没去公园因为天气太冷了。）
As the weather was fine, we went for a walk.（因为天气很好，我们去散步了。）
Since he is rich, he can buy whatever he wants.（既然他很富有，他可以买任何他想要的东西。）
I like him because he is very kind.（我喜欢他因为他很善良。）
As she was late, she missed the first class.（因为她迟到了，她错过了第一节课。）
Since you don't like the movie, we can watch something else.（既然你不喜欢这部电影，我们可以看别的。）
The boy was crying because he lost his toy.（男孩在哭因为他丢了他的玩具。）
As they were good friends, they helped each other.（因为他们是好朋友，他们互相帮助。）
Since it is raining heavily, we have to stay at home.（既然雨下得很大，我们不得不待在家里。）
He was late because of the traffic jam. = He was late because there was a traffic jam.（他迟到是因为交通堵塞。）
As you know, he is a very hardworking student.（如你所知，他是一个非常勤奋的学生。）
Since you have grown up, you should be more independent.（既然你已经长大了，你应该更独立。）
We didn't go swimming because the water was too cold.（我们没去游泳因为水太冷了。）
As there was no one at home, I left a message.（因为家里没人，我留了个口信。）
Since you are free tomorrow, let's go shopping.（既然你明天有空，我们去购物吧。）
She was angry because he didn't keep his promise.（她很生气因为他没有遵守诺言。）
As the book is very interesting, I can't put it down.（因为这本书很有趣，我放不下它。）
Since he has a lot of experience, he can do the job well.（既然他有很多经验，他能把工作做好。）
They couldn't finish the work because they had no time.（他们没能完成工作因为他们没有时间。）
As it was a holiday, the shops were all closed.（因为是假日，商店都关门了。）
Since you have made a mistake, you should apologize.（既然你犯了错误，你应该道歉。）
He was absent because he had a headache.（他缺席了因为他头疼。）
As he is very clever, he can solve the problem easily.（因为他很聪明，他能轻易地解决问题。）
Since it is already late, we should go to bed.（既然已经很晚了，我们应该上床睡觉了。）
I didn't buy the dress because it was too expensive.（我没买那条裙子因为它太贵了。）
As he didn't study hard, he failed the exam.（因为他学*不努力，他考试不及格。）
Since you are good at math, you can help me with my homework.（既然你擅长数学，你可以帮我做家庭作业。）
The dog barked because it saw a stranger.（狗叫了因为它看到了一个陌生人。）
As she loves music, she often goes to concerts.（因为她喜欢音乐，她经常去听音乐会。）
Since he has a lot of money, he can travel around the world.（既然他有很多钱，他可以环游世界。）
We stayed at home because of the bad weather. = We stayed at home because the weather was bad.（我们待在家里因为天气不好。）
As the teacher was very strict, the students were all afraid of him.（因为老师很严格，学生们都怕他。）
Since you have visited the place before, you can show us around.（既然你以前去过这个地方，你可以带我们参观一下。）
She was late because her alarm clock didn't go off.（她迟到了因为她的闹钟没响。）
As he was in a bad mood, he didn't want to talk to anyone.（因为他心情不好，他不想和任何人说话。）
Since it is snowing, we can't go skiing.（既然下雪了，我们不能去滑雪了。）
He passed the exam because he studied hard.（他通过了考试因为他学*很努力。）
As there was a lot of noise outside, I couldn't sleep well.（因为外面有很多噪音，我睡不好。）
Since you are my friend, you should understand me.（既然你是我的朋友，你应该理解我。）
They went to the park because they wanted to have a picnic.（他们去公园因为他们想去野餐。）
As she is very beautiful, many boys like her.（因为她很漂亮，很多男孩喜欢她。）
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