[紧急求助]I realized that she ( ) in.用had come 还是came?为什么?要如何判断?

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[紧急求助]Irealizedthatshe()in.用hadcome还是came?为什么?要如何判断?[紧急求助]Irealizedthatshe()in.用hadcome还是came?为什么?要如

[紧急求助]I realized that she ( ) in.用had come 还是came?为什么?要如何判断?
[紧急求助]I realized that she ( ) in.用had come 还是came?为什么?要如何判断?

[紧急求助]I realized that she ( ) in.用had come 还是came?为什么?要如何判断?
had come
她进来这个动作在我注意到之前已经完成,所以用过去完成时