Hello!
Here you are:
To show similarity: just as
To show difference: counter to
To summarize: in short
To show place or position: above
To show time: prior to
Hope this helps :)
b. garden
A preposition is found in a sentence in which it introduces information to the reader like a location perhaps. The object of the preposition can be a noun, a pronoun or even a gerund that is usually together with the preposition in order to complete a prepositional phrase. In the statement above, the prepositional phrase is "on the garden", therefore the preposition is "on" and the object of the preposition is the "garden" to which the preposition "on" refers to.