Hello,
This is my analysis for your sentence:
First I think the sentence should be corrected:
We are trying to put ball on the table
We are trying to put
( a/the ball ) or
( balls/the balls ) on the table.
We: subject
are trying: verb into the present continuous tense
( are: auxiliary+ try: stem+ ing )
to put: verb into the infinitive
a ball: object
on: preposition
the: difinite article
table:common noun referring to a place
