She must't be there . She has gone to school.

问题描述:

She must't be there . She has gone to school.
has gone to 的意思和用法

1) has gone to “已经去了”
2) has gone to 是过去完成时,在这里是 做去完成时作谓语,而且根据前句可知 “she has gone to school” 对现在产生了影响.
加油.