as作尽管,虽然连词用的时候,句子倒装.规则是adj/adv/n.(省略冠词）/v.放句首,后面用主语+谓语,如果动词已经提前倒装,用主语+情态动词或助动词.例如：Youngasheis,heworkslikeaveteran.Quicklyasheisdriving,westilltrusthim.Childashewas,hewasabletowork.以上句子可以用though替换,但不能用although.如用although不能倒装,即,Althoughheisyoung,he...Althoughheisdrvingquickly,we...