giảng dùm em grammar

[englishboy]

minh co mot y kien the nay past perfect say ra truoc mot thoi diem trong qua khu vay co nghia la since their rate has gone up say ra truoc, con tat ca cai con lai thu dung simple past

[Ryu]

minh co mot y kien the nay past perfect say ra truoc mot thoi diem trong qua khu vay co nghia la since their rate has gone up say ra truoc, con tat ca cai con lai thu dung simple past