Emphasis:
* Strongly: "I strongly have the feeling that something is wrong."
* Deeply: "She deeply has a passion for music."
* Truly: "I truly have no idea what happened."
Manner:
* Carefully: "He carefully has all the details of the plan written down."
* Quickly: "She quickly has her luggage packed."
* Quietly: "He quietly has a beer in the garden."
Frequency:
* Often: "I often have trouble sleeping."
* Rarely: "He rarely has time for himself."
* Always: "She always has a smile on her face."
Other adverbs:
* Luckily: "Luckily, I have a spare key."
* Sadly: "Sadly, he has to leave."
* Fortunately: "Fortunately, I have enough money for the trip."
The best adverb to use will depend on the specific context and the meaning you want to convey.