UC知道____ he walked, he saw millions of stars above trees
来源：百度知道 编辑：UC知道 时间：2024/06/13 10:18:44
a. As b. When c. While
为什么选A？？ 求详细解析
为什么选A？？ 求详细解析
他们都有当....的时候,而When/While引导条件从句时,主句都用进行时态,而题目主句用的是过去时态而不是过去进行时,所以不选择When/while
因为walk 是一个持续性动词
when 后如果是持续性动词必须用进行时态 短暂性动词用一般式
while后的动词必须是进行时态 不可以用短暂性动词
只有用as可用一般过去时表示持续
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he home have some ____.
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