Understanding the difference between onto and on
Q1. The cat jumped ___ the table
ONTO indicates movement to a position. The cat was elsewhere, then on the table. As cats do.
Q2. The book is ___ the shelf
ON indicates position. The book rests on the shelf. Dust may accumulate.
Q3. She climbed ___ the roof
ONTO shows movement upward. The roof was reached. Safety considerations apply.
Q4. Keep your hands ___ the table
ON indicates position. Hands remain on the surface. Visibility is maintained.
Q5. Which sentence is correct?
ON TO (two words) is preferred in formal writing. ONTO is also acceptable. Grammar evolves.