As和with有什么区别?as做连词可以接句子,with是介词,可以接句子吗?

As和with有什么区别?as做连词可以接句子,with是介词,可以接句子吗?
如上,as可以接句子,with可以吗?是不是with只能接名词性短语和动名词结构?如果是这样,那这篇文章这个句子怎么解释?But they may have little choice with Washington nervous about North Korea's potential to export atomic weapons.South Korea's leaders,also,do not want to be seen as completely turning their back on their neighbor.

with一般不接句子吧.
1.with或without-名词/代词+形容词；
2.with或without-名词/代词+副词；
3.with或without-名词/代词+介词短语；
4.with或without-名词/代词+动词不定式；
5.with或without-名词/代词+分词.
那篇文章的句子只不过with后面接的内容长了点,中心还是Washington nervous,后面的只不过是用来修饰Washington nervous的.