不定式做状语用的最多的是目的状语.
1.they will go to the station to meet the guests.
另外不定式还常与in order to,so as to连用做目的状语.例如：
2.in order to catch the train,he hurried through his work.
或 he hurried through his work in order to / so as to catch the train.
而做结果状语只是仅限于learn（得知）,find（发现）,see,hear,to be told（被告知）,make（使得）等具有界限含义的动词.
3.He returned home to learn his daughter had just been engaged.他回家后得知女儿刚刚订婚了.（结果）
而only+不定式常常表示令人不快的结果.
4.i hurried to Professor Wang's house only to find he was out.
我匆忙的感到王教授的家可是却发现他外出了.
与so/such.as to连用,可作目的状语或结果状语,均可.例如：
5.She was so angry as to be unable to speak.她气的连话都说不出来.
最后too...to...有的语法书上说是做程度状语,但更多的语法书称其为结果状语.这个句型就不用举例子了吧?