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The verb 'be' is one of the most common and important verbs in English language. It is used to express various aspects including identity, location, time and existence. Here are some of the contexts in which the word 'be' is commonly used:1. Identity: The verb 'be' is used to indicate who or what someone or something is. For example: "I am a student", "He is a doctor", "This is my house".2. Location: The verb 'be' is also used to express where someone or something is located. For example: "My school is in the city centre", "The keys are on the table", "They are in the park".3. Time: The verb 'be' can also be used to express when something happens. For example: "It is six o'clock", "Today is Monday", "The concert was last night".4. Existence: The verb 'be' can be used to indicate the existence of someone or something. For example: "There is milk in the fridge", "Are there any problems?", "I am not sure if he is still alive"In addition to these contexts, the verb 'be' is also used to form various tenses in English, such as the present tense ("I am"), past tense ("He was") and future tense ("It will be"). Understanding the different contexts and usage of the verb 'be' is essential for effective communication in English.