The past tense of respond is responded.
The past participle is responded.
Yes, responded is the past tense of respond.
yes
I will only respond in the present tense.
No, respond means in the present, now or in the future; responded means in the past, previously: I have that information and can respond to the inquiry. I will respond to your inquiry as soon as I can. I responded to the inquiry last week.
Only verbs have tenses. "Responsible" is an adjective.
Believe it or not, for the past 6 years, Iraq have the PERFECT society.
If you are asked 'How was your day?' then you would respond in past tense.
Eons members were a threat to Facebook so it was eliminated.
Eons members were a threat to Facebook so it was eliminated.
Honor Society has had many live chats in the past.