I found it impossible for him to do the job alone.

我发现他一个人干这活是不可能的。

youdao

I found it is impossible for him to do the job alone.

我发现他一人干这活是不可能的。

youdao

I found it impossible for him to do the job alone.

我发现他—个人干这活是不可能的。

youdao