A study — by allen lucks,director of big brothers big sisters,found volunteerss had better health than nonvolunteers.A was lead B led C leading D was leading 我就是拿不准要不要选was,was在句中不能当谓语吗?为什么不选呢?

A study — by allen lucks,director of big brothers big sisters,found volunteerss had better health than nonvolunteers.A was lead B led C leading D was leading 我就是拿不准要不要选was,was在句中不能当谓语吗?为什么不选呢?
A study — by allen lucks,director of big brothers big sisters,found volunteerss had better health than nonvolunteers.A was lead B led C leading D was leading 我就是拿不准要不要选was,was在句中不能当谓语吗?为什么不选呢?

A study — by allen lucks,director of big brothers big sisters,found volunteerss had better health than nonvolunteers.A was lead B led C leading D was leading 我就是拿不准要不要选was,was在句中不能当谓语吗?为什么不选呢?
A study 是句子的主语,found 是谓语,后面接了一个省略了that 的宾语从句.
所以句子的主干为A study found volunteerss had better health than nonvolunteers.
led by allen lucks是过去分词作定语,修饰study.因为study 和lead 之间是被动的,所以用的是过去分词.如果你选A,那was led应该作谓语,那found 也是谓语,而且2个谓语之间没有and之类的连词,所以你的思路是不正确的

分析句子结构如下： 主语a study 谓语是 found,后面是一个省略that的宾语从句。此句中已经有谓语，所以前面不能再用 was led。 选B的原因是，led过去分词，做study的后置定语，同时表明被动关系。

答案选择B，在这里A study表示一项研究，是主语 。 led by allen lucks 相当于是后置定语，是修饰A study的，起补充说明的作用。

如果补全的话就是
a study that/which was led by allen lucks
在这里是为了简洁直接用过去分词代替整个定语从句 所以选B
这种情况很多
A car made by our company was selling well.

lead也有动词的意思，此处by allen lucks,director of big brothers big sisters是从句，全写出来是A study（that） — by allen lucks,director of big brothers big sisters，即有that，，A study — by allen lucks,director of big brothers ...

全部展开

lead也有动词的意思，此处by allen lucks,director of big brothers big sisters是从句，全写出来是A study（that） — by allen lucks,director of big brothers big sisters，即有that，，A study — by allen lucks,director of big brothers big sisters是从句而不是主句，在整句话中做主语，如果是主句的话就应该用lz的方法了

收起

整个这么长都是一句话 发现了吗 全是逗号 也就是说 只能走一个谓语动词 就是已经给出的found 所以他能再有was

led 做定语 谓语是found 主语是A study ；by allen lucks,director of big brothers big sisters（定语修饰study）found （发现）志愿者的身体比非志愿者的身体要好。

不选was,后面的成分作定语，修饰study.这句话的主语是director。