The suffix "-t" is commonly used in the English language to form the past tense of regular verbs. For example, the verb walk becomes walked when the "-ed" suffix is added, while some verbs simply change their form, such as put, which remains put in the past tense. In addition to verb conjugation, "-t" can also appear in various nouns and adjectives. For instance, the word cat can become cats in plural form, while adjectives like hot can be used to describe temperature. This suffix helps convey different meanings and grammatical functions in language.