she's had to go to chicago on a business trip中she后面为什么用is ha

she's had to go to chicago on a business trip中she后面为什么用is had to?
去芝加哥开会表示将来,为什么要用be had to?这是什么时态啊?
直接说she has to go to chicago on a business trip不行吗?
注:出自《走遍美国》第七课《grandpa's trunk》
推己及人 1年前 已收到1个回答 举报

youronlybaby 幼苗

共回答了19个问题采纳率:89.5% 举报

不是is had to,而是has had to,完成时态

1年前

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