来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/27 08:46:01
过去进行时与现在完成进行时有什么区别?
The little boy is dirt from head to foot because he _____ in the mud all morning.
A.has played B.is playing C.has been playing D.was playing 该选哪一个呢?
D
因为小男孩in the mud这件事肯定是发生在发现他dirty 之前.
all morning 显示了空白部分肯定是个持续性的动作.
综合过去+进行,答案是D
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