一句英语语法问题My brother had gotten the upper hand in their fight,but I was kept standing by if necessary.这个be kept doing是什么语法……

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一句英语语法问题Mybrotherhadgottentheupperhandintheirfight,butIwaskeptstandingbyifnecessary.这个bekeptdoing是什么

一句英语语法问题My brother had gotten the upper hand in their fight,but I was kept standing by if necessary.这个be kept doing是什么语法……
一句英语语法问题
My brother had gotten the upper hand in their fight,but I was kept standing by if necessary.
这个be kept doing是什么语法……

一句英语语法问题My brother had gotten the upper hand in their fight,but I was kept standing by if necessary.这个be kept doing是什么语法……
不理解你的问题是什么意思.
固定的词组啊:keep doing sth.
kept是keep的过去是啊.
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