behaves
v. A2 Elementary US //bɪˈheɪvz// UK //bɪhˈeɪvz// be·haves
v. to act in a specific way, especially to follow rules or be polite.
v. to conduct oneself in a specified manner; to act according to social standards or rules.
The children always behave well when they visit their grandmother.
The software behaves differently depending on which operating system you use to run it.
In high-pressure environments, even the most disciplined professionals may find it difficult to behave with the level of composure expected of their rank.
Usage
Often used intransitively with an adverb of manner; when used without an adverb, it implies acting correctly or politely.
Pitfall
He behaves himself very goodHe behaves himself very wellBehave is modified by the adverb 'well', not the adjective 'good'.