how long have you known maryam? -> how long ago

<div class="content-answer-1 enable-event-click" style="overflow-x:auto;text-justify:inter-word;text-align:justify"><p><strong>Đáp án: </strong></p><br /><p>$\Rightarrow$ <span>How long ago did you know Maryaim? </span></p><br /><p><span>$\color{green}{\text{— — — — — — — — — — }}$</span></p><br /><p><span><strong>Giải thích:</strong></span></p><br /><p><span>$\text{–}$ DHNB: ago $\rightarrow$ Thì QKĐ</span></p><br /><p><span>$\text{–}$ How long $\text{+}$ have/has $\text{+}$ S $\text{+}$ V(3/ed) ?</span></p><br /><p><span>$\Rightarrow$ How long ago $\text{+}$ did $\text{+}$ S $\text{+}$ V-inf ?:  Ai đó làm gì cách đây bao lâu </span></p><br /><p><span>$\text{–}$ Tạm dịch: Bạn biết Maryaim cách đây bao lâu?</span></p></div><div class="pt12"><div></div></div>