As,For,Because,Because of以上四者表示因为是的区别?该怎么用?

都可以表示因为。具体如下？
As可以=Because如：
As the weather is good, i would like to go shopping.
because the weather is good, i would like to go shopping.
for 和because of只能和短语连接使用，如:
I would lie to go shopping because of the good weather.
I would lie to go shopping for the good weather.

从语法上看：
as和because意思差不多,但是语气比because弱，一般表示明显的原因。
for一般只用于句尾，用逗号与主句隔开。
because是最普遍的，表示原因的大都可以用它，后面接that从句。
because of 后面接名词或者动名词。

as 表原因后可跟名词短语或句子,但它不能用于句首.
because表原因后只可跟句子,它可用于句首或句子中间.
because of 后只可跟名词短语来表原因,可用于句首或句中间.
for只可跟名词短语,也只可用于句子中间.
例：
I so happy FOR your help.
I so happy BECAUSE OF your help.
I so happy AS your help.
I so happy,because you gave me a hand.

as,明显的理由 As he looks pale, he must be ill.
for,推测的理由(用在句中) The day breaks out, for the birds are singing.
because,一般笼统的、直接的原因，后面加从句
because of,同上，后面加名词／动名词