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英语Byrd now knew that he would be able to reach the South Pol

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英语Byrd now knew that he would be able to reach the South Pole was 300miles away .最想知道句中的would be able to 是什么时态,尤其想了解would 后面一定要有个be will 后面也一定要跟be why thankyou .
不是,这个be是连着后面的,be able to do是个固定词组. 再答: 所以这个be跟前面的will would没有关系。
再答: 采纳哟亲~