Perfect tense:consist of a form of the auxiliary verb have and the past participle of the main verb.
(Have+ Past Participle)
EX:1 (Present) I have played basketball with Zach.2 (past) I had had a snack before playing football. 3 (Future) I will have finished studying by dinner.
Forms of Have:Have, Had, Has, Will have
Emphatic: is the form of a verb that gives special force to a simple present or past tense verb. For the present tense use do or does before the base form of the verb. FOr the past tense, use did before the base form of the verb. Do not confused this with do, does, and did used as auxiliary verbs in questions or negative sentences.
EX:1 I do like how you think.2why do we think it will help. 3This does kinda hurt.