Arrival is not a verb and does not have a past tense. Arrive is the verb form, and arrived is the past tense and past participle.
Arrived is a verb. It's the past tense of arrive.
The past tense of "has" is "had" and the past tense of "have" is "had."
Was and were are both the past tense of be. The present tense is: I am he is you are they are The past tense is: I was he was you were they were
the past tense of am is was and the past tense of has is had
The word "were" is past tense. It is the past tense of the verb "to be."
The word arrived is not a noun; arrived is the past tense of the verb to arrive. The noun form is arrival.
The past tense of "will" is "would" and the past tense of "be" is "was" or "were" depending on the subject (singular or plural).
HAD is the Past Tense of TO HAVE.
The past tense of "am" is "was" and the past perfect tense of "has" is "had."
The past tense of "have" is "had."
The past tense of "you will not" is "you would not."
The past tense of "exist" is "existed." The past perfect tense is "had existed."