Difference in meaning between these two? <br/><br/><li>He wanted a divorce but his wife <b>would not</b> agree.</li><br/><br/>He wanted a divorce but his wife <b>did not</b> agree.<br/><br/>And these two?<br/><br/><li>Yesterday morning, the car <b>wouldn't</b> start.</li><br/><li>Yesterday morning, the car <b>didn't</b> start.</li>