When am, are, is and the preceding verbs are abbreviated, vowels are generally omitted. English abbreviations are different from acronyms, which use the abbreviated form of a word or phrase to express the complete form. English abbreviation is a simple form of English words, which uses important letters in English words to express the meaning of the whole word. Also called abbreviation.

English personal pronouns

Personal pronouns in English refer to pronouns that directly refer to people or things, and belong to the category of pronouns like "you", "I" and "he" in Chinese. Common English personal pronouns are: I, you, he, she and it (nominative). Personal pronouns have different forms when used as different components in sentences, such as nominative, accusative and third person singular forms.

Personal pronouns have nominative and accusative forms, and personal pronouns of the third person also have gender changes. The nominative case is mainly used as the subject of a sentence and can also be used as a predicative in formal style; The objective case is mainly used as an object, and it is often used as the predicate of a sentence in spoken language. In spoken English, if the predicate and other components are omitted, the personal pronoun accusative can be used as the subject.

Baidu Encyclopedia-English Personal Pronouns