The inflectional ending "-ed" is used in English to indicate the past tense of regular verbs. It is added to the base form of the verb to show that the action took place in the past. For example, in the sentence "She worked hard yesterday," the word "worked" is the past tense form of the verb "work," with "-ed" added to indicate that the action happened in the past. Additionally, the "-ed" ending is also used to form the past participle of regular verbs, which is often used in passive voice constructions or to create verb tenses such as the present perfect and past perfect.
