Which are correct:<br/><br/><span style="color:#ff0000;">1-I might be staying here for long.</span><br/><span style="color:#ff0000;">2-I might be staying here for a long time.</span><br/><span style="color:#ff0000;"></span><br/><span style="color:#ff0000;">3-I might not be here for a long time. Actually, I might leave tomorrow.</span><br/><span style="color:#ff0000;">4-I might not be here for long. Actually, I might leave tomorrow.</span><br/><br/>Gratefully,<br/>Navi.