upon同above點分?

*Upon
= on

example:
Upon her head she wore a hat.

Upon your arrival( as soon as you arrive), please report in the reception desk.

example:
*To assure upon (Law)= to promise; to undertake.

*To come upon.
(a) To befall.
(b) To attack or invade.
(c) To have a claim upon; to become dependent upon for
support; as, to come upon the town.
(d) To light or chance upon; to find; as, to come upon hid
treasure.

*To take upon= to assume.
To take upon one's self.
(a) To assume; to undertake; as, he takes upon himself to
assert that the fact is capable of proof.
(b) To appropriate to one's self; to allow to be imputed
to, or inflicted upon, one's self; as, to take upon
one's self a punishment.


*Above
= in or to a higher position than something else.

example:
She has rented a room above a shop.

Her name comes above mine on the list.

upon(迅速接近)
above(高於...之上)
很大分別