Question

请帮忙做几道英语习题

Why ___ to talk about it yesterday?
A. didn't a meeting hold B. wasn't a meeting held C. wasn't held a meeting D. a meeting wasn't held

The river smells terrible. People must ___ dirty things into it.
A. be stopped to throw B. be stopped from throwing C. stop to throw D. stop from throwing。
给出答案后请解释一下

Answer 1

B
会议被举行，所以用被动语态。则为be动词+P.P 而选择C的话，填held a meeting ，应该是Why not held a meeting，不需要被动语态了。A、D本身形式就错了，D不能用陈述句。A的语法就错了。

D
这里不需要被动。人必须停止向里面扔垃圾，是主动的。所以排除AB，而stop to do sth是停止手上的事去做另一件事(指的是前面的sth ),stop from doing sth 是停止做这件事（指的是这里的sth）

望采纳。有问题可以继续问哦

Answer 2

Why ___ to talk about it yesterday?
A. didn't a meeting hold B. wasn't a meeting held C. wasn't held a meeting D. a meeting wasn't held
选B，这里一方面考察的是疑问句型 疑问代词why后应接 助动词或者be动词+主语+动词 这个顺序！
另一方面，a meeting自己不能举行，只能是被举行，所以应用be动词构成被动语态。
The river smells terrible. People must ___ dirty things into it.
A. be stopped to throw B. be stopped from throwing C. stop to throw D. stop from throwing。
选B
这条河闻起来很糟糕，人们应该被阻止往里面扔脏东西。
“阻止某人做某事” stop sb from doing sth
“某人被阻止做某事” sb be stopped from doing sth.

【英语牛人团】倾情奉献，脑力结晶，满意请记得及时采纳哦，谢谢^_^

Answer 3

选B 因为这句是疑问句型，疑问代词why后应接be动词+主语+动词 ，而且会议应是被人举行，属于被动语句 ，so 应选 wasn't a meeting held
选B 有关短语：“阻止某人做某事” stop sb from doing sth
“某人被阻止做某事” sb be stopped from doing sth.

Answer 4

B,被动语态
B，被阻止做某事

追问

第二题不太懂

追答

stop sb from doing sth, 阻止某人做某事
改为被动： （sb) be stopped from doing sth.
这里和情态动词must 连用了，就是（sb) must be stopped from doing sth.某人必须被阻止做某事