非谓语动词不定式作状语时相当于一个状语从句，不定式作状语时往往用来作目的状语、结果状语或原因状语
1．不定式用来作目的状语：作目的状语时，不定式的逻辑主语通常也是全句的主语，这里往往译作“为了，想要”
(2009·辽宁卷)To be a winner，you need to give all you have and try your best
要想成为赢家，你要付出所有并竭尽全力
2．不定式用于 so
as to；enough to；too
to；only to 等结构中作结果状语
Would you be so kind as to lend me your bicycle
你能不能行行好，借给我你的自行车
He is such a fool as to think that his strange behaviour can inflect others
他如此愚蠢以至于认为他奇怪的行为会影响他人
He hurried to the booking office only to have been told all the tickets had been sold out
他匆忙去了售票处，结果被告诉所有的票已经卖完了
专家提醒： “only＋to do”表示出乎意料的结果，tell 和主语 He 之间存在动宾关系，因而应用不定式的被动结构
而现在分词作结果状语则表示自然而然的结果
His parents died，leaving him an orphan
他的父母去世了，使他成为孤儿
(2010·江西卷)There were many talented actors out there just waiting________
A．to discover B．to be discoveredC．discovered
