1) He laughed. 2) He laughed happily. Which word answers the question : How did he laugh? Happily is an adverb of manner(方式副词）, which tells us about “laugh”. 3) He seldom laughed. How often did he laugh? Seldom is an adverb of frequency（频度副词）, which also tells us about “laugh”. 4) He laughed in the cinema. Where did he laugh? in the cinema is an adverbial phrase of place（地点副词短语）, which tells us about “laugh”.

Adverb/ adverbial phrases: 副词是用来修饰句中动词的，说明动作发生的时间、地点、方式、频度等，充当句中的状语成分。