On, Above and Over
Incorrect : Your books are over the bed.
Correct : Your books are on the bed.
Incorrect : Raise your arms on your head.
Correct : Raise your arms above your head.
Incorrect : The cat jumped on the wall.
Correct : The cat jumped over the wall.
Note: “On” suggests the idea of touch. The prepositions above and over can often be used in the same way. For example:
We flew above/over the clouds.
They suggest that the two things are not in touch with each other. However, "over” is mostly used to express the idea of movement. ‘Above' mainly suggests a higher position.
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