She (want) to help but couldnot get there in time .what is the approprite form of"want"?is "had wanted" right?why?

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She (want) to help but couldnot get there in time .what is the approprite form of"want"?
is "had wanted" right?why?

wanted
理由:but连接的是两个并列句,并且后句承前省略主语,因此两句必须用同一时态.

wanted 因为后面有could 用的是过去时态,所以要一致. 两个动作是同时发生的,应该用同一种时态.只能用过去式

wanted