~VERB TABLE~

First, you should know the meaning of "present participle".
present participle = Verb + ing (being, watching, singing ....... etc)
http://hk.knowledge.yahoo.com/question/question?qid=7007120403586
accept + -ing = accepting
agree + -ing = agreeing
believe + -ing = believing
bring + -ing = bringing
build + -ing = building
buy + -ing = buying
cost + -ing = costing
die + - ing = d - ie + -ying = dying
disappear + -ing = disappearing
drop + -ing = drop + p + -ing = dropping