Here's why:

* The Rock Cycle: The process of rock changing from one type to another is called the rock cycle. It's a continuous process, but not a direct conversion.

* Weathering and Erosion: For metamorphic rock to become sedimentary, it must first undergo weathering (breaking down into smaller pieces) and erosion (transporting those pieces).

* Sediment Formation: The broken-down pieces, now called sediments, are deposited in a new location. Over time, these sediments are compacted and cemented together.

* Lithification: This process of compacting and cementing is called lithification, which turns the sediments into sedimentary rock.

Therefore, the steps to go from metamorphic to sedimentary are:

1. Weathering and Erosion: Breaking down the metamorphic rock.

2. Sediment Transport: Moving the broken pieces to a new location.

3. Deposition: The sediments settle and accumulate.

4. Lithification: The sediments are compacted and cemented into sedimentary rock.

In summary: Metamorphic rock doesn't directly transform into sedimentary rock. It needs to go through a series of processes involving weathering, erosion, and lithification.