No. Tentatively is an adverb formed from the adjective tentative by adding -ly.
The opening of the store was tentatively scheduled for late August.
You have tentatively been selected to play the part of the third tree, or at least the rock.
Tentatively is an adverb.
Because he made her nervous, she tentatively accepted his offer of dinner.
It is an adjective.It is a an adjective.
The opening of the store was tentatively scheduled for late August.
Based upon my somewhat limited information, I can only answer your question tentatively. The meeting has been tentatively scheduled for this Friday at 10:00 a.m.
The meeting was tentatively agreed to -before I checked my schedule! The evening news programs are always tentatively scheduled when they follow a sporting event.
John tentatively peeked under his bed because checking for monsters always made him uneasy.
carefully or cautiously
You would say "tentatively August 6, 2016." The adverb "tentatively" modifies the date, indicating that it is not a confirmed date but rather a provisional one. Using "tentative" as an adjective would not be grammatically correct in this context.
You might be thinking of the word tentative or tentatively.
The antonym for tentatively is certainly, surely & definitely. I found this on Thesaurus.com. Its a good website for to look up on meanings, antonym, synonym & more.
You have tentatively been selected to play the part of the third tree, or at least the rock.
Tentatively is an adverb.
He moved tentatively across the ice...
Because he made her nervous, she tentatively accepted his offer of dinner.