英语翻译问题？ 英语翻译问题？
\u82f1\u8bed\u7ffb\u8bd1\u95ee\u9898\uff1f\u82f1\u8bed\u7ffb\u8bd1,\u6839\u636e\u6240\u7ed9\u7684\u5355\u8bcd\u9010\u8bcd\u9010\u53e5\u7ffb\u8bd1\uff0c\u8fd9\u53eb\u76f4\u63a5\u7ffb\u8bd1\u5373\u76f4\u8bd1\uff0c\u5982\u679c\u7ecf\u8fc7\u52a0\u5de5\u5f62\u6210\u901a\u4fd7\u6613\u61c2\u7684\u53e5\u5b50\uff0c\u518d\u5e26\u5165\u60c5\u666f\u6a21\u5f0f\u52a0\u4e0a\u611f\u60c5\u8272\u5f69\u7ffb\u8bd1\u5f62\u6210\u610f\u8bd1\uff0c\u8fd9\u79cd\u7ffb\u8bd1\u66f4\u52a0\u4f18\u7f8e\u6709\u610f\u5883\u3002
I saw a boy in the classroom = \u6211\u770b\u89c1\u4e00\u4e2a\u7537\u5b69\u5728\u6559\u5ba4\u91cc
\u5149\u53ea\u662f\u539f\u53e5\u5b50\uff1b\u6ca1\u6709\u6307\u51fa\u8bf4\u8fd9\u8bf4\u8bdd\u7684\u4eba\u7684\u4f4d\u7f6e
has＋现在分词是动词的现在完成时时态，这里的has become没有错，动词become的过去式是became，但它的过去分词是become。请看下面，点击放大：
因为has后加过去分词表示现在完成时，而become的过去式是became，而过去分词是become. 特殊单词的过去分词形式需要特殊记忆。
回答如下：
因为have / has + become是现在完成时。现在完成时的构成是：助动词have / has + 过去分词。动词原形become的过去式是became，过去分词是become，故助动词has后面要跟过去分词become。类似例子：
He has gone to Beijing.
We have finished the work.
He has been there twice.
时态的原因，这里的has done（现在完成时），表示动作到现在为止已经完成或刚刚完成，强调对现在产生的影响，而become是动词原形，become的过去分词是became，因此需要用has became
因为has后面要加become的完成时，become的完成时还是become。
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