althongh as long as while之间的区别哪些可以放在句中或句首 ,哪些只能放在句中

although意为"尽管" 一般引导让步状语从句 不与but连用。
as long as意为"只要"。。
while意为"当。。的时候" 后面接动名词。还可以用在句中，表示“但是，然而”的意思。
希望可以帮到你！GOOD LUCK!!

although：虽然, 尽管
仅用作连词，连接句子，构成让步状语从句
Although they are poor they are happy.
虽然他们很穷，但很快乐。
Although it was so cold, he went out without an overcoat.
天气虽然很冷, 他没有穿大衣就出去了。
as long as：只要, 在...的时候，既然
用作连词
I will cooperate as long as I am notified on time.
只要及时告诉我，我就会合作
As long as you've offered, I accept.
既然你已给我，我就接受
while：
用作连词：当...的时候, 虽然，然而，而，而且
While he was eating, I asked him to lend me $2.
当他正在吃饭时,我请他借给我二英镑。
While I understand what you say, I can't agree with you.
虽然我理解你的意思，但我还是不同意。
The soles are leather, while the uppers are canvas.
鞋跟是皮的，而鞋面是帆布的，
while还可用作名词：一会儿, 时间
The project wasn't worth my while.
这项方案不值得我花工夫
Wait a while.
等一会儿。

1.although较正式,语气强 Although he was tired,he went on working.2.although引导的从句放在主句前后均可,有时还可放在句中.Although many difficulties are still ahead,we are determined to make greater achi...