ATTEND - PRESENT SIMPLE
★ i attend
★ you attend
★ he/she/it attends
★ we attend
★ you attend
★ they attend
ATTEND - PRESENT CONTINUOUS
★ i am attending
★ you are attending
★ he/she/it is attending
★ we are attending
★you are attending
★ they are attending
ATTEND - PRESENT PERFECT
★ i have attended
★ you have attended
★ he/she/it has attended
★ we have attended
★ you have attended
★ they have attended
The Simple Past Tense, also called Simple Past or Preterite is a verb tense that is used to describe completed action happend in the past. It is the most basic form of past tense and it is formed by adding d, ed or ied to the base structure of the verb.
ATTEND - PRESENT PERFECT CONTINUOUS
★ i have been attending
★ you have been attending
★ he/she/it has been attending
★ we have been attending
★ you have been attending
★ they have been attending
ATTEND - PAST SIMPLE
★ i attended
★ you attended
★ he/she/it attended
★ we attended
★ you attended
★ they attended
ATTEND - PAST CONTINUOUS
★ i was attending
★ you were attending
★ he/she/it was attending
★ we were attending
★ you were attending
★ they were attending
ATTEND - PAST PERFECT
★ i had attended
★ you had attended
★ he/she/it had attended
★ we had attended
★ you had attended
★ they had attended
A transitive verb always has a noun that  receives the action of the verb, called the direct object.
An intransitive verb never has a direct or indirect object. Although an intransitive verb may be followed by an adverb or adverbial phrase, there is no object to receive its action
ATTEND - PAST PERFECT CONTINUOUS
★ i had been attending
★ you had been attending
★ he/she/it had been attending
★ we had been attending
★ you had been attending
★ they had been attending
ATTEND - FUTURE SIMPLE
★ i will attend
★ you will attend
★ he/she/it will attend
★ we will attend
★ you will attend
★ they will attend
ATTEND - FUTURE CONTINUOUS
★ i wil be attending
★ you will be attending
★ he/she/it will be attending
★ we will be attending
★ you will be attending
★ they will be attending
ATTEND - FUTURE PERFECT
★ i will have attended
★ you will have attended
★ he/she/it will have attended
★ we will have attended
★ you will have attended
★ they will have attended
ATTEND - FUTURE PERFECT CONTINUOUS
★ i will have been attending
★ you will have been attending
★ he/she/it will have been attending
★ we will have been attending
★ you will have been attending
★ they will have been attending

Conjugation of verb Attend