Answer:The three basic forms of a verb are the base form, the past form, and the -ed form (past participle form). For e.g. sleep slept (sometimes, the second and third forms are the same verb 'slept', but they aren't used in the same way.)
The past form of the verb, or the second form, expresses the simple past tense (also called the past indefinite tense).
Hence, option A is correct.
Options B and C: The past and present perfect tense both use the third form of the verb, the past participle: (had + 'verb+ed') and (has + 'verb+ed'). Hence these are not the correct options.
Option D: The past continuous tense uses the present participle (verb form that ends in -ing) and not the simple past form. Hence D is incorrect.
Explanation:Hope IT helps
