Seid is the second person plural of the verb sein - to beihr seid = you are
Seit is a preposition,which translates as since and therefore has no past participle.If you mean seid (2nd person plural of the verb sein - to be) then the past participle is seid gewesen
Sattar Seid was born in 1987.
Gordon Seid is 5' 6".
Alan R. Seid was born in 1957.
Seid Memić was born on 1950-03-08.
Joseph Brahim Seid died in 1980.
Joseph Brahim Seid was born in 1927.
are you there = bist du da (singular, informal) are you there = seid ihr da (plural, informal) are you there = sind Sie da (formal)
Christopher Seid has written: 'Prayers to the other life'
Judith Seid has written: 'God-Optional Judaism'
Some words that have the sound "seid" in them include: beside, inside, and outside.