缘由状语从句连词的选择两题

（ ）I lost my purse. I had to come to the police station.

Otherwise , I would have no money to go home.

A.For

B.Since

C.Because

答案给了B，我感觉C没错啊 都是从属连词，而且A作为并列连词不可以至于句子开头么？

向老师请教，谢谢你。

I thought no one was in the room , there was no light on. But I wasnt sure about it.

A.because

B.since

C. for

本题选C，请问老师为何必须要选这个并列连词呢？AB有哪些特别需要所以不可以选么？

谢谢你。

（ ）I lost my purse. I had to come to the police station.

Otherwise , I would have no money to go home.

A.For

B.Since

C.Because

答案给了B，我感觉C没错啊 都是从属连词，而且A作为并列连词不可以至于句子开头么？

向老师请教，谢谢你。

回答如下：

这题不能选B，答案C 为正确答案，由于连词because是用来回答WHY 的特殊疑问句的，是直接缘由，重点在从句，as/since从句缘由是显而易见是什么原因，不能用来回答WHY 的疑问句，重点在主句，

Because I lost my purse, I had to come to the police station.

由于我把钱包弄丢失了，所以我不能不来到警察局

可以边特殊疑问句

-Why did you have to come to the police station?

-Because I lost my purse

I thought no one was in the room , there was no light on. But I wasnt sure about it.

A.because

B.since

C. for

本题选C，请问老师为何必须要选这个并列连词呢？AB有哪些特别需要所以不可以选么？

谢谢你。

回答如下：

答案C 为正确答案，for 这里是并列连词，只不过对前面句子内容起附加推断和讲解的原因，不是直接缘由

【because, as, since, for 详细不同如下】

【1】because “由于”，是从属连词，连接缘由状语从句。表示明确地直接是什么原因和理由。because 语气最强，可以回答why 引导的问句。表示缘由从句是重点

He is loved by all, because he is honest.

由于他诚实，所以大伙都爱他。

Why are you late?你为何迟到？

Because my bike was broken on the way.

由于我的自行车在路上坏了。

【2】as “由于，因为”，是从属连词，它引导的从句多放于句首，多表示理由是已知的,显而易见，理由以外从句的才是重点。

As you are going, I will accompany you.

由于你要去，那我就陪着你吧。

As it is raining, let’s stay at home.

下雨了，大家就呆在家吧。

【3】since “由于，既然”，是从属连词，只用于引导已知是事实的句子，所表示的是一种间接或附带是什么原因。

Since you have no licence, you are not allowed to drive.

既然你没执照，你就不能开车。

【4】for “由于”，是并列连词，连接并列句。表示非直接的、随后附加讲解和补充说明的原因或判断的原因，语气比because轻。for不需要于句首，而用于主句之后。

He must be honest, for he is loved by all.

由于大伙都爱他，所以他肯定是诚实的。