You used to be short did not you?用be是不是to后面要用动词原形?

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You used to be short did not you?用be是不是to后面要用动词原形?

You used to be short did not you?用be是不是to后面要用动词原形?
You used to be short did not you?
用be是不是to后面要用动词原形?

You used to be short did not you?用be是不是to后面要用动词原形?
某种意义上不是
首先要强调 to 后面可以+doing,e.g.look forward to doing
这里之所以用动词原形,应该是used to do的句型
你不能单纯理解为是to的原因,最主要还是前面的动词,你要结合起来一起看.