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.

         Xiǎo Mínɡ, wǒ yònɡ nǐ de chē mɑ?
False: 小明，我用你的车吗？
        Xiǎo Mínɡ, wǒ nénɡ(ké yǐ) yònɡ nǐ de chē mɑ?
True: 小明，我能（可以）用你的车吗？

在这个征求对方意见的句子里，缺少表示允诺的词，应在动词的前头加上“能”或者“可以”。
This sentence of asking the other side of for permission lacks a word expressing permission. One should add 能 or 可以 before the verb.