<font color="#0000ff">Hi EFers and teachers around.</font><br/><br/><font color="#0000ff"></font><br/><br/><br/><font color="#0000ff">I need to justify myself about which sentences below are correct:</font><br/><br/><font color="#0000ff"></font><br/><br/><br/><font color="#0000ff">(I did search and study the thread but still fail to make myself clear on this)</font><br/><br/><font color="#0000ff"></font><br/><br/><br/><font color="#0000ff">1) I <i><font color="#ff0000">would not have to realize</font></i> that mistake until I join and intensively study the languange at englishforum.com.</font><br/><br/><font color="#0000ff"></font><br/><br/><br/><font color="#0000ff">2) I <font color="#ff0000"><i>would not have realized</i></font> that mistake until I join and intensively study the languange at englishforum.com.</font><br/><br/><font color="#0000ff"></font><br/><br/><br/><font color="#0000ff">3) I <font color="#ff0000"><i>would not to have realized</i></font> that mistake until I join and intensively study the languange at englishforum.com.</font><br/><br/><font color="#0000ff"></font><br/><br/><br/><font color="#0000ff">Thanks</font>