Tenses in English grammar are essential for indicating the time of an action or event. There are three main tenses: past, present, and future. Each tense has different forms and is used to convey different time references. Here’s a detailed explanation of the tenses with suitable examples:

1. Past Tense:
   The past tense is used to describe actions or events that have already happened or occurred in the past.

Simple Past: This tense is used for a single completed action in the past. It is formed by adding “-ed” to regular verbs or using irregular verb forms. Example: She walked to the store yesterday.

Past Continuous: This tense is used for ongoing or continuous actions in the past. It is formed by using “was/were” and the present participle (-ing form) of the verb. Example: They were playing soccer when it started raining.

Past Perfect: This tense indicates an action that occurred before another action in the past. It is formed by using “had” and the past participle of the verb. Example: He had already eaten dinner when I arrived.

2. Present Tense:
   The present tense is used to describe actions or events happening at the current moment or those that are generally true.

Simple Present: This tense is used for routine actions, general facts, or permanent situations. It is formed by using the base form of the verb. Example: He plays tennis every Sunday.

Present Continuous: This tense is used for actions happening right now or temporary actions. It is formed by using “am/is/are” and the present participle (-ing form) of the verb. Example: They are studying for their exams.

Present Perfect: This tense is used for actions that started in the past but have a connection to the present. It is formed by using “have/has” and the past participle of the verb. Example: I have visited that museum before.

3. Future Tense:
   The future tense is used to describe actions or events that will happen in the future.

Simple Future: This tense is used for actions or events that will occur later. It is formed by using “will” or “shall” followed by the base form of the verb. Example: We will have a meeting tomorrow.

Future Continuous: This tense is used for actions that will be ongoing in the future. It is formed by using “will be” and the present participle (-ing form) of the verb. Example: She will be traveling to Europe next month.

Future Perfect: This tense is used for actions that will be completed before a specific time in the future. It is formed by using “will have” and the past participle of the verb. Example: They will have finished the project by Friday.

These examples provide a comprehensive overview of the tenses in English grammar. However, it’s important to note that tenses can have further variations and can be combined with other grammatical structures to convey more specific meanings. By understanding and using tenses effectively, you can accurately express the time frame of actions and events in your communication.