英语中的 "many" 不仅可以用于肯定句和否定句，也可以用于一般疑问句来询问数量或程度。但是，当使用 "many" 时，通常应用于可数名词的复数形式，对于不可数名词或单数名词，应使用相应的量词，如 "much" 或 "a lot of"。
当 "many" 用于一般疑问句中时，通常意味着询问数量或程度的问题。例如：
- Many people attended the event. (肯定句)
- Did many people attend the event? (一般疑问句)
在上面的例子中，一般疑问句是通过在句子开头添加 "did" 来形成的。这种形式也可以用于其他动词，例如 "have" 或 "be"。
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Many students have completed the assignment. (肯定句)
- Have many students completed the assignment? (一般疑问句)
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Many of the books are available online. (肯定句)
- Are many of the books available online? (一般疑问句)
需要注意的是，当使用 "many" 时，它通常用于可数名词的复数形式。如果它用于不可数名词或单数名词，就需要使用相应的量词，如 "much" 或 "a lot of"。
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Many cars were parked on the street. (肯定句)
- Were many cars parked on the street? (一般疑问句)
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Many water was spilled on the floor. (错误的用法)
- Was much water spilled on the floor? (正确的用法)
