pls tell me which sentence is correct and why.Which sentence is wrong n why.<br/><br/>Jim has been misbehaving since the weekend.<br/><br/>Jim has been misbehaving since THE past 3 days<br/><br/>Jim has been misbehaving for 3 days<br/><br/>Jim has been misbehaving since friday.<br/><br/>It has been 3 days since Jim has been misbehaving<br/><br/>thxs