自己写了一个英语句子,请高手帮忙看有什么语法错误没。

One day, a student asked teacher a question:“why friend can easily turn into opponent, but opponent is hardly to turn into a friend”.The teacher answered:“because pull down a house is easier than erect a house”

第1个回答  2013-07-27
friend和opponent前面没有冠词,
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