they found it is impossible to finish the task ahead of time

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 13:32:45

they found it is impossible to finish the task ahead of time.这句话为什么不可以用it is 只能用it.
可不可以具体点举例啊什么的

如果改为They found that it is impossible...就可以了.that 后面的是字句,可以是完整句.要是没有"that" 就一定不能有be动词了,不然一个句子出现了两个动词而之间却没有连接词（如and、or)是错误的句子.

they found it is impossible to finish the task ahead of time They will ____their best to finish their task ahead of time Busy_he is,he can finish the task ahead of time.A.because B. 4.It is impossible to finish the task ____.A.in such sort a 20.It is important that we ________ the task ahead of time. 问一道英语选择题it is important that we______ the task ahead of time The workers were praised for▁▁（finish）the task ahead of time L do not think he can finish the task ahead of time ,-----?A You may find it necessary to finish the work ahead of time 改 It is hard for us to finish the task on time.Could you send 68.It's impossible for him to finish the difficult task in s To be honest, it is a s___to finish the task