The adverb zongshi(总是)is an event related adverb so are frequency adverbs and probability adverbs,but it is different from frequency adverbs and probability adverbs in meaning and usage.It should be classified as a"regularity adverb"according to its characteristics.At the same time,it should be defined as a"regularity adverb of inevitability"through its comparison with wangwang(往往)and tongchang(通常).This paper also discusses the similarities and differ-ences between regularity adverbs,frequency adverbs and probability adverbs.They all have event relevance,but semantically highlight different aspects of events,so they have different usages.Frequency adverbs and probability adverbs focus on the"results"of events,while regularity adverbs focus on the correspondence of"condition-result"within an event.