Hi.<br/><br/>It is correct to say;<br/><br/><i>The time passed quickly. we didn't understand the pass of time</i>.<br/><br/>what is the correct expression in that case.<br/><br/>For instance, I and my friend were talking for a while, then we realized that we had been talking for three hours.<br/><br/>Then I said, <i>The time passed quickly, we didn't understand the pass of time.</i><br/><br/>I would appreciate if you could tell me what native speakers say in the occation I cited.<br/><br/>Thanks