Hi, Tamero. There is something odd here. The words 'ground' and 'stone' are both verbs, and either of them could be used either actively or passively in sentences. However, 'The ground stone' is a nounal structure. 'Ground stone' would be a powder, a powder made by . . . grinding stone. You could generate sentences like, 'The ground powder didn't make my chocolate milkshake taste better,' or 'The ground powder was shovelled into bags by a group of workers.' The first sentence is in active voice; the second, passive.
According the simple grammatical rules we should have " a subject - a verb and an object to change the sentence into passive. Here, this phrase
is quite different " The ground stone" Ground is an adjective which describes
the stone . WHATEVER WE SAY " THE GROUNDED STONE " OR WHAT SOEVER
" GROUNDED IS AN ADJECTIVE" Better to say "they grounded the stone."
What do you think ?
ANY COMMENTS WOULD BE WLCOMMED.
with nice compliments.
Saleemabu, you're right. :-D The ground stone is not in passive voice. Ground functions as adjective. The example, They grounded the stone is in active voice, not passive voice. :-D Moreover, there's a difference in meaning between these two verbs, ground and grounded:
#1 Present tense, grind; past tense, ground (to wear smooth)
Active voice, present tense: They grind the stone.
Active voice, past tense: They ground the stone.
Passive voice, present tense: The stone is ground.
Passive voice, past tense: The stone was ground.
#2 Present tense, ground; past tense, grounded (to place on the ground)
Active voice, present tense: They ground the stone.
Active voice, past tense: They grounded the stone.
Passive voice, present tense: The stone is grounded.
Passive voice, past tense: The stone was grounded.