Which are correct:<br/><br/><span style="color:#800080;">1) Where can't I go?</span><br/><span style="color:#800080;">2) Where can I not go?</span><br/><br/><span style="color:#800080;">3) Which ones can't I take?</span><br/><span style="color:#800080;">4) Which ones can I not take?</span><br/><br/><span style="color:#800080;">5) In which cases can't I be sure I am right?</span><br/><span style="color:#800080;">6) In which cases can I not be sure I am right?</span><br/><span style="color:#800080;">7) In which cases I cannot be sure I am right?</span><br/><br/>Gratefully,<br/>Navi.