he built his first computer while he was at university usein

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 19:02:22

he built his first computer while he was at university useing an old television.
为什么用useing.
请指导

先说一下、是using,不是useing
这是非谓语的用法：
句意：他在大学时用一台旧的电视做成了他的第一台电脑.
由于句子中已经有谓语built、故句子中不能再出现第二个谓语、此时就要用非谓语了.因为use的主语是he、是主动关系、即是用的主语是he、所以用ing形式的非谓语、即是using
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