Define verb tense. Write a sentence that has a simple present tense verb. Rewrite it, changing the verb to simple past tense, simple future tense, each of the perfect tenses, and each of the progressive tenses.

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Verb tense refers to the form of a verb that indicates the time of an action or event. It helps to convey when something happened or will happen. There are several verb tenses, including simple present tense, simple past tense, simple future tense, perfect tenses, and progressive tenses.

A sentence that has a simple present tense verb would be: "She reads a book every day."

Now let's rewrite this sentence using different verb tenses:

Simple Past Tense: "She read a book yesterday."
Simple Future Tense: "She will read a book tomorrow."

Present Perfect Tense: "She has read a book this week."
Past Perfect Tense: "She had read a book before."
Future Perfect Tense: "She will have read a book by next week."

Present Progressive Tense: "She is reading a book right now."
Past Progressive Tense: "She was reading a book yesterday at this time."
Future Progressive Tense: "She will be reading a book at this time tomorrow."

These examples demonstrate the various verb tenses and how they can be applied to a sentence.