BACK - PRESENT SIMPLE
★ i back
★ you back
★ he/she/it backs
★ we back
★ you back
★ they back
BACK - PRESENT CONTINUOUS
★ i am backing
★ you are backing
★ he/she/it is backing
★ we are backing
★you are backing
★ they are backing
BACK - PRESENT PERFECT
★ i have backed
★ you have backed
★ he/she/it has backed
★ we have backed
★ you have backed
★ they have backed
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.
BACK - PRESENT PERFECT CONTINUOUS
★ i have been backing
★ you have been backing
★ he/she/it has been backing
★ we have been backing
★ you have been backing
★ they have been backing
BACK - PAST SIMPLE
★ i backed
★ you backed
★ he/she/it backed
★ we backed
★ you backed
★ they backed
BACK - PAST CONTINUOUS
★ i was backing
★ you were backing
★ he/she/it was backing
★ we were backing
★ you were backing
★ they were backing
BACK - PAST PERFECT
★ i had backed
★ you had backed
★ he/she/it had backed
★ we had backed
★ you had backed
★ they had backed
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
BACK - PAST PERFECT CONTINUOUS
★ i had been backing
★ you had been backing
★ he/she/it had been backing
★ we had been backing
★ you had been backing
★ they had been backing
BACK - FUTURE SIMPLE
★ i will back
★ you will back
★ he/she/it will back
★ we will back
★ you will back
★ they will back
BACK - FUTURE CONTINUOUS
★ i wil be backing
★ you will be backing
★ he/she/it will be backing
★ we will be backing
★ you will be backing
★ they will be backing
BACK - FUTURE PERFECT
★ i will have backed
★ you will have backed
★ he/she/it will have backed
★ we will have backed
★ you will have backed
★ they will have backed
BACK - FUTURE PERFECT CONTINUOUS
★ i will have been backing
★ you will have been backing
★ he/she/it will have been backing
★ we will have been backing
★ you will have been backing
★ they will have been backing

Conjugation of verb Back