求助一道英语单选,At last,the boy found themselves in a pleasant park with trees providing shade and__down to eat their picnic lunchA.to sit B.sat C.sitting D having sat为什么答案是B,不是C,sitting不应该是主动关系吗,如果B是

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求助一道英语单选,At last,the boy found themselves in a pleasant park with trees providing shade and__down to eat their picnic lunchA.to sit B.sat C.sitting D having sat为什么答案是B,不是C,sitting不应该是主动关系吗,如果B是

求助一道英语单选,At last,the boy found themselves in a pleasant park with trees providing shade and__down to eat their picnic lunchA.to sit B.sat C.sitting D having sat为什么答案是B,不是C,sitting不应该是主动关系吗,如果B是
求助一道英语单选,
At last,the boy found themselves in a pleasant park with trees providing shade and__down to eat their picnic lunch
A.to sit B.sat C.sitting D having sat
为什么答案是B,不是C,sitting不应该是主动关系吗,如果B是因为是过去式的话,那为什么providing不用过去式?还有D选项有什么用法,

求助一道英语单选,At last,the boy found themselves in a pleasant park with trees providing shade and__down to eat their picnic lunchA.to sit B.sat C.sitting D having sat为什么答案是B,不是C,sitting不应该是主动关系吗,如果B是
是found and sat
而不是found……doing

首先这句话的意思要先搞懂。这里sat 和found 是并列的关系，他们找到一个有着一些能提供树荫的令人舒适的公园，接下来自然是坐下来吃他们的野餐了

注意前后逻辑你翻译成中文就弄明白了！

您好，请注意在填空前的词是and，这是一个连词，and前后的句子是并列关系，也就是说时态要相同。然后再看主语，sit的主语其实是和find是一样的，都是the boy，而provide的主语是tree，所以sit的时态应该和find一样，用过去式。至于D的用法，就是用在表示一个动作先于另一个动作，have done是比较早的，两个动作不并列。...

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您好，请注意在填空前的词是and，这是一个连词，and前后的句子是并列关系，也就是说时态要相同。然后再看主语，sit的主语其实是和find是一样的，都是the boy，而provide的主语是tree，所以sit的时态应该和find一样，用过去式。至于D的用法，就是用在表示一个动作先于另一个动作，have done是比较早的，两个动作不并列。

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是并列关系。主语是男孩，应与sat同时态。而C选项是providing,是动名词作定语修饰trees

and连接found.和sat ，providing修饰 trees

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