ATTACH - PRESENT SIMPLE
★ i attach
★ you attach
★ he/she/it attaches
★ we attach
★ you attach
★ they attach
ATTACH - PRESENT CONTINUOUS
★ i am attaching
★ you are attaching
★ he/she/it is attaching
★ we are attaching
★you are attaching
★ they are attaching
ATTACH - PRESENT PERFECT
★ i have attached
★ you have attached
★ he/she/it has attached
★ we have attached
★ you have attached
★ they have attached
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.
ATTACH - PRESENT PERFECT CONTINUOUS
★ i have been attaching
★ you have been attaching
★ he/she/it has been attaching
★ we have been attaching
★ you have been attaching
★ they have been attaching
ATTACH - PAST SIMPLE
★ i attached
★ you attached
★ he/she/it attached
★ we attached
★ you attached
★ they attached
ATTACH - PAST CONTINUOUS
★ i was attaching
★ you were attaching
★ he/she/it was attaching
★ we were attaching
★ you were attaching
★ they were attaching
ATTACH - PAST PERFECT
★ i had attached
★ you had attached
★ he/she/it had attached
★ we had attached
★ you had attached
★ they had attached
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
ATTACH - PAST PERFECT CONTINUOUS
★ i had been attaching
★ you had been attaching
★ he/she/it had been attaching
★ we had been attaching
★ you had been attaching
★ they had been attaching
ATTACH - FUTURE SIMPLE
★ i will attach
★ you will attach
★ he/she/it will attach
★ we will attach
★ you will attach
★ they will attach
ATTACH - FUTURE CONTINUOUS
★ i wil be attaching
★ you will be attaching
★ he/she/it will be attaching
★ we will be attaching
★ you will be attaching
★ they will be attaching
ATTACH - FUTURE PERFECT
★ i will have attached
★ you will have attached
★ he/she/it will have attached
★ we will have attached
★ you will have attached
★ they will have attached
ATTACH - FUTURE PERFECT CONTINUOUS
★ i will have been attaching
★ you will have been attaching
★ he/she/it will have been attaching
★ we will have been attaching
★ you will have been attaching
★ they will have been attaching

Conjugation of verb Attach