The verb "input" is an irregular verb in English, used to describe the action of entering data or information into a computer or electronic device.

In the present simple tense, "input" follows its base form for most subjects: "I input," "you input," "he/she/it inputs," and so on. For example, "She inputs the data into the spreadsheet."

In the past simple tense, "input" changes to "input" or "inputted." Both forms are acceptable, with "input" being more commonly used in British English and "inputted" in American English. For instance, "He inputted the information into the database" or "He input the information into the database."

The past participle of "input" is also "input" or "inputted." When forming perfect tenses, such as present perfect or past perfect, the past participle is combined with auxiliary verbs. An example sentence is "They have inputted the figures for the report" or "They have input the figures for the report."

Understanding the irregular conjugation of "input" is important for accurately describing actions related to data entry or information processing. The verb "input" is used in various contexts, including technology, computing, and data management, highlighting its importance in modern communication and technology.