"gave grounds" is a correct and usable phrase in written English.
It means to provide reasons or evidence for something. Example: The lawyer gave several grounds for why his client should be acquitted.
The French finance minister, Francis Mer, said that stable oil prices and the "historically low" cost of capital gave grounds for guarded short-term optimism.
But Buggs said the new genetic discoveries gave grounds for cautious optimism: "I feel more hopeful now than I did in 2012".
A woman caught in the act of adultery could be killed by her husband on the spot, while a wife who drank more than a moderate amount of wine gave grounds for divorce.
The new awareness of date rape led to legal changes in the United States that gave grounds for victims to prosecute attackers, although much discussion remained about the legal standards of consent.
It gave grounds for moderate optimism, at least to the burgeoning social democratic parties, that progress was ubiquitous and eternal: the economies were growing; workers were well protected and enjoyed superb health benefits; consumers could be confident that their rights wouldn't be abused by the firms they transacted with.
This gave grounds for Kambara [21] to consider the local (molecular) displacement as the order parameter of the transition.
