作业帮为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail.
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 00:57:18
为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail.
为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail.
为什么是It is imperative that this mission not fail.而不是It is imperative that this mission don't fail.
Imperative “必要的,不可避免的；命令的,势在必行的"
像这样的词,后面接的句子谓语为“should + 动词原形”其中,should可以省略.
句子结构为：it's imperative that sb + (should)+ 谓语动词原形+其他成分
eg. 1. It was imperative that he (should) act as naturally as possible... 最重要的是他要做到尽可能自然.
2. It's imperative that he (should) not be seen here. 他不应该呆在这儿.
所以,这句话就可以为” It is imperative that this mission should not fail.当务之急是这个任务不能失败.
It is imperative that this mission not fail ，not前省略了should，虚拟语气It's essential that this mission not fail. be essential that 用虚拟语气是固定搭配还是这种BE+形容词+虚拟语气的句式都是这样的BE+形容词+虚拟语气的句式，不是所有的形容词都可以这样用，一般表示建议、命令、必...
全部展开
It is imperative that this mission not fail ，not前省略了should，虚拟语气
收起
强调动词fail，表示不能失败的语气很强烈。
也可以理解为句子的谓语是“should + 动词原形”，其中should省略了。
not fail相当于should not fail
should省略了