combined 和 plus 有何分別??

Plus - has several forms as follows :
preposition : plus being a preposition has the same meaning as combined.
Example :
- Five plus four equals to nine.
- Five combined with four equals to nine.
Adjective : Her talent is a plus factor of her success.
Noun : We will have many pluses with him joining our team because he is very clever and willing to help other people.
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Combined : adjective

- with same meaning as plus.
- always has to be in the form of “combined with”
- can also be used as an adjective referring to two different things combined together. (Plus as an adjective does not have this feature.)
Example :
When Mary combined with Jenny they become the best players for tennis double.