Simple perfect preterite : idiom or way of talking about something in the past time, using the auxiliary verb 'have' before a participle, to refer to something that may be happening in the present time. So : Auxiliary Word Participle Present . Example : -"everyone has seen how to sing" . Simple perfect preterite-time idiom differs from COMPOSED mode, in the explicit use of time in the main verb. Example : - "all HAN - SEE That I SING in the mornings".
