co bn nao biet cac cong thuc tieng anh lop 7 ko a giup mik vs chieu mik thi r

Past simple( Qúa khứ đơn):
*Tobe:
(+) S+ was/were
(-)  S + was/were +not
(?)  Was/were + S?
*V thường:
(+)  S + $V_{2/ed}$ 
(-)   S + did+ not + $V_{0}$ 
(?)   Did + S + $V_{0}$?
~$LookWhatYouMadeMeDo_{}$~