Playing tennis and playing basketball. no verbs for them.
Answer:
It depends on your relationship with him/her. Probably say something like, "Thank you for being an inspiration", or "Thanks for being so patient". Anything you think you want to say.
The adverb is slowly, Because adverbs tell what kind, how or to what extent. The adverb slowly (usually, they end in ly) is describing HOW someone did something. EX. Jessie ran slowly across the field. It tells how jessie ran.
And adverbs describe a verb.
A, I was challenged by the customer service....
