Question

一道sat语法题

Strong wind, sweeping almost unchecked over great distances, is a prime component of the grasland climate.

swept unchecked 是什么用法？
with almost unchecked sweeping over great distances 哪错了？
sweeping almost unchecked over great distances是划线部分。这是正确答案。

Answer 1

sweeping unchecked 中 unchecked是过去分词作状语修饰sweeping 相当于形容词做伴随状语 与逻辑主语 Strong wind是主表关系 意思是 未受抑制的 不受限制的
with almost unchecked sweeping over great distances 错在 过去分词和现在分词 都缺 逻辑主语
应该是 with Strong wind almost unchecked sweeping over great distances ，it is a prime component of the grassland climate.

所以sweeping almost unchecked over great distances是正确答案。

Answer 2

sweeping...这是现在分词做伴随状语，相当于which sweeps。 因为主语是wind，所以用主动。

追问

这个我当然知道，我问的是swept unchecked的用法，还有with almost unchecked sweeping over great distances哪错了。

Answer 3

同意楼上，回答很标准了