As an adjective describing a noun:
* "We have a tentative plan to go on vacation next month, but we need to confirm our flights and accommodation."
* "The meeting was marked by a tentative mood, as the participants were unsure of the outcome."
* "She gave a tentative smile, unsure of how he would react to her suggestion."
As an adverb describing a verb:
* "He tentatively reached out for her hand, unsure if she would accept."
* "The team tentatively agreed to the proposal, but they had some reservations."
* "She tentatively suggested a new marketing strategy, but wasn't sure if it would be well-received."
In a phrase:
* "The agreement was tentative, subject to further negotiations."
* "He gave a tentative nod, but didn't commit to anything."
* "The company's future is tentative, as it faces many challenges."
You can also use synonyms for "tentative" such as:
* Provisional
* Preliminary
* Uncertain
* Hesitant
* Unsure
Remember to choose the word that best fits the context of your sentence and accurately conveys the meaning you want to express.