The verb 'to be' in English is used as a main verb or an auxiliary verb. As a main verb, it means 'to exist.' As an auxiliary verb, it helps to show tense.
Forming Questions: Part 1: Wh questions with to be.
Verb to be
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Verb to be
Present simple forms of 'to be' – am/is/are - Test-English
Verb To Be: Present, Past, & Future - LANGUAGE ON Schools
THE ROLE OF THE VERB TO BE IN ENGLISH – тема научной статьи по языкознанию и литературоведению читайте бесплатно текст научно-исследовательской работы в электронной библиотеке КиберЛенинка
How to Use the Verb “To Be” in Present Tense
Verb to be
Forms of the Verb “To Be”