to see
动词不定式是 to+do(动词原形)的形式
saw是过去式,不能出现在不定式中
The old man was very happy__his wife in the hospital.(see)
The old man was very happy__his wife in the hospital.(see)
为什么?
为什么不用to saw?
为什么?
为什么不用to saw?
英语人气：483 ℃时间：2019-11-09 11:13:38
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