shouldn't=don't have to吗如果不等于，那shouldn't等于哪个 三个词的短语 you shouldn't frighten the cat.=you ___ ___ ____ frighten the cat.

shouldn't=don't have to吗如果不等于，那shouldn't等于哪个 三个词的短语 you shouldn't frighten the cat.=you ___ ___ ____ frighten the cat.
shouldn't=don't have to吗
如果不等于，那shouldn't等于哪个 三个词的短语 you shouldn't frighten the cat.=you ___ ___ ____ frighten the cat.

shouldn't=don't have to吗如果不等于，那shouldn't等于哪个 三个词的短语 you shouldn't frighten the cat.=you ___ ___ ____ frighten the cat.
不一样的.
shouldn't不应该
don't have to不必
LZ你那个题目的答案是should not to
题目考查的是should作为情态动词的用法结构

不等。前者是不应该，是主观的，而后者是不需要，是客观的

前者是不应该的意思，后者是不需要的意思。有区别

needn't=don't have to
shouldn't=should not do / can not do
但是在这个句子里
你也只能用don't have to了 其他都不通。。

全错了，是ought not to