please correct

[Anonymous]

Dear teacher,
Please correct the following ones.

1)It is one day earlier than the plan.
2)It is earlier one day than the plan.
3)Comparing to the productive plan, it is one day earlier.

Thanks a lot

[Rusty]

1)It is one day earlier than the plan. (OK).
2)It is earlier by one day than the plan.
3)Compared to the productive plan, it is one day earlier.