SAT语法求教Determined to make a name for herself as a writer of short stories,Helen never submits anything to an editor until revising it several times.REVISING怎么错了?

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SAT语法求教Determined to make a name for herself as a writer of short stories,Helen never submits anything to an editor until revising it several times.REVISING怎么错了?

SAT语法求教Determined to make a name for herself as a writer of short stories,Helen never submits anything to an editor until revising it several times.REVISING怎么错了?
SAT语法求教
Determined to make a name for herself as a writer of short stories,Helen never submits anything to an editor until revising it several times.REVISING怎么错了?

SAT语法求教Determined to make a name for herself as a writer of short stories,Helen never submits anything to an editor until revising it several times.REVISING怎么错了?
REVISING错了,因为同several times连用,说明是校订了几次之后才投稿.并且revise动作发生在 submits 之前,因此应用现在分词的完成式.
因此:REVISING改成:having revised

revising 应改为having revised,
Helen never submits anything to an editor until [having revised] it several times 。此句的意思是“海伦在给编辑部交稿前要几经修改,否则她从来不交”,即“修改”发生在“交稿”之前,因此用完成时态 having revised。

时态