AGREE - PRESENT SIMPLE
★ i agree
★ you agree
★ he/she/it agrees
★ we agree
★ you agree
★ they agree
AGREE - PRESENT CONTINUOUS
★ i am agreeing
★ you are agreeing
★ he/she/it is agreeing
★ we are agreeing
★you are agreeing
★ they are agreeing
AGREE - PRESENT PERFECT
★ i have agreed
★ you have agreed
★ he/she/it has agreed
★ we have agreed
★ you have agreed
★ they have agreed
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
AGREE - PRESENT PERFECT CONTINUOUS
★ i have been agreeing
★ you have been agreeing
★ he/she/it has been agreeing
★ we have been agreeing
★ you have been agreeing
★ they have been agreeing
AGREE - PAST SIMPLE
★ i agreed
★ you agreed
★ he/she/it agreed
★ we agreed
★ you agreed
★ they agreed
AGREE - PAST CONTINUOUS
★ i was agreeing
★ you were agreeing
★ he/she/it was agreeing
★ we were agreeing
★ you were agreeing
★ they were agreeing
AGREE - PAST PERFECT
★ i had agreed
★ you had agreed
★ he/she/it had agreed
★ we had agreed
★ you had agreed
★ they had agreed
The PAST SIMPLE tense, is also called the PRETERIT.
AGREE - PAST PERFECT CONTINUOUS
★ i had been agreeing
★ you had been agreeing
★ he/she/it had been agreeing
★ we had been agreeing
★ you had been agreeing
★ they had been agreeing
AGREE - FUTURE SIMPLE
★ i will agree
★ you will agree
★ he/she/it will agree
★ we will agree
★ you will agree
★ they will agree
AGREE - FUTURE CONTINUOUS
★ i wil be agreeing
★ you will be agreeing
★ he/she/it will be agreeing
★ we will be agreeing
★ you will be agreeing
★ they will be agreeing
AGREE - FUTURE PERFECT
★ i will have agreed
★ you will have agreed
★ he/she/it will have agreed
★ we will have agreed
★ you will have agreed
★ they will have agreed
AGREE - FUTURE PERFECT CONTINUOUS
★ i will have been agreeing
★ you will have been agreeing
★ he/she/it will have been agreeing
★ we will have been agreeing
★ you will have been agreeing
★ they will have been agreeing

Conjugation of verb Agree