Use adjectives after sense verbs such as look, smell, taste, feel, or sound or after linking verbs (is, am, are, was, were and other forms of be): The steak tastes very good.
Most adverbs end in –ly; use adverbs after transitive and intransitive verbs/verbs of action: She submits her paperwork promptly.
Bad and Badly
Bad is an adjective: I feel bad about the delay.
Badly is an adverb: It doesn't hurt so badly now.
Good and Well,
Good is an adjective: You look good in red. You wear it well.
Well is an adverb: He gets along well with his co-workers.
Well is also an adjective when it is used to refer to health: I am not well today. I don’t feel well (OR good) today.
Real and Really
Real is an adjective meaning "genuine"; really is an adverb: The admiral has real charm, so he is really charismatic.
The use of real as an adverb is colloquial or nonstandard: He writes real really well.
Sort of and kind of are often misused in written English by writers who actually mean rather or somewhat: Lannie was kind of rather saddened by the results of the test.
Sure and Surely
Sure is an adjective; surely is an adverb. Try changing sure to certain and surely to certainly.
I am sure about my decision to retire. We surely were shocked by your decision to retire.