Will Mary go to the movie us?I dont't think so.She ____to go shopping (has decided)为啥用这时态

Will Mary go to the movie us?I dont't think so.She ____to go shopping (has decided)为啥用这时态
Will Mary go to the movie us?I dont't think so.She ____to go shopping (has decided)为啥用这时态

Will Mary go to the movie us?I dont't think so.She ____to go shopping (has decided)为啥用这时态
因为这个意思强调说她已经决定了.没有一个明确的时间点,不用别的时态

她过去已经决定好了