Foreigners often make some strange mistakes in Chinese when they study the most difficult language--- ---Chinese. We try to analyze typical sentences to correct these errors.

          Tā qù túshūɡuǎn yào jiè yì běn shū.
False: 他去图书馆要借一本书。
          Tā yào qù túshūɡuǎn jiè yì běn shū.
True: 他要去图书馆借一本书。

在表示目的的连动句中，能源动词一般放在第一个动词的前边。
In a sentence with verbal constructions in series, the auxiliary verb normally precedes the first verb.