2012年托福考试语法辅导：不定式作状语

不定式作状语
　　不定式作状语是相当普遍的语法现象，通常表示目的、结果或原因
　　如：I got an early morning to catch the first train to London. (表目的)
　　She raised the lid only to find an empty bottle. (表结果)
　　He trembled to think of his shameful failure. (表原因)
　　TOEFL种主要涉及第一种用法
　　例题： www.Examw.com
　　(1)
　　Using their bills as needles, tailorbirds sew large leaves together with plant fiber
　　to forming their nests.
　　应改为：to form
　　解释：to是不定式的标志词，应接动词原形作目的状语
　　(2)
　　The dromedary camel is raised especially to racing.
　　应改为：race
　　解释：此句中的to不是介词, 而是不定式的标志词, 之后应接动词原形作目的状语