as,and,because,since区别

Question

as,and,because,since区别

Answer 1

as,and,because,since区别
(1) 关于 because：语气最强,表示直接原因,可用于回答 why 提出的问题、引导表语从句、用于强调句等,而其余三者均不行：
“Why didn’t he come?” “Because he was ill.” “他为什么没来?”“因为他病了.”
My stomach hurts because I have eaten too many apples.我肚子痛,因为苹果吃得太多.
That’s because you can’t appreciate music.这是因为你不能欣赏音乐.
It is because he is honest that I like him.是因为他诚实我才喜欢他.
(2) 关于 since 与 as：
a.两者所表示的原因都是人们已知的,即对已知事实提供理由,而不是表示直接原因.since 比 as 语气稍强,且比 as 略为正式,它们引导的从句通常放在主句之前,有时也放在主句之后：
As you weren’t there,I left a message.由于你不在那儿,我留了个口信.
Since you are wrong,you should apologize.你既然错了,就应该道歉.
b.since 可用于省略句,而其他不行：
Since so,I have nothing to say.既然如此,我无话可说.
and的用法很多.当它表示因果关系 and连接两个动词或两个分句,带有因果关系,此时and相当于so,可译为“便”、“ 于是”、“因而”、 “结果”等.如：
She couldn’t find her mother and began to cry.她找不到妈妈,于是哭了起来.
It’s a fine day today,and everyone is busy.今天是个好天气,因而人人都很忙.
与其他三个没多大关系