1. Verb Tense Tense denotes the time of the action indicated by a verb. The time is not alwaysthe same as that indicated by the name of the tense.
2. 6 Types Verb Tenses Present Past FuturePresent Past Future Perfect Perfect Perfect
3. Present Perfect Tense Present perfect tense expresses action completed at the present time (perfect means complete) or begun in the past and continuing into the present. This tense uses the helping verbs has and have and the past participle of the verb. Examples:  He has written a letter to his uncle. (completed action)  The Waltons have lived here for seven years. (continuing)
4. Past Perfect Tense Past perfect tense expresses action completed before certain time in the past. (This is the before-past tense.) It uses the helping verb had and the past participle of the verb. Example: She had written the letter before I saw her.
5. Future Perfect Tense Future perfect tense expresses action which will be completed before a certain time in the future. (This is the before-future tense) It uses the helping verbs will have or shall have and the past participle of the verb. Example: He will have finished the paper before next Friday.
6. Verb Forms Verb Forms Regular Irregular
7. Regular Verbs Regular verbs form their past tense and past participle by adding –ed or –d to their present tense form. More than 95% of all English verbs are regular. Regular verbs cause few problems in speaking and writing.
8. Regular verbs and their Principal PartsPrincipal Present Present Past PastParts: Tense Participle Tense ParticipleVerb:To call call, calling called (have) calls calledTo dust dust, dusting dusted (have) dusts dusted