1, How long had you studied before you qualified?------ mềnh ko nhầm thì lùi 1 thì nếu có before rứa?
2. Where had you first met your husband?
------ Thg th2i first, sencond,.....last đi với hàon thành, mà cái này xra ở QK nên phang QKHT lun
3. We had been waiting here for an hour and he hadn't phoned yet
------ Có yet là hoàn thành ùi
4. Have lived