What is predication analysis？Try to use it to analyze the following sentences。

什么是述谓结构分析法？试用它分析所给句子。 (1)The man sells ice—cream． (2)Is the baby sleeping？ (3)It is snowing． (4)The tree grows well． Predication analysis is a new approach for sentential meaning analysis．The predication is usually considered an important common category shared by propositions，questions，commands，etc．Predication analysis is to break down predications into their smaller constituents：argument(logical participant)and predicate(relation element)．The“predicate”is the maj or or pivotal element governing the argument．