Can you say 'curve down' and curve up' or does curve imply pointing downwards? <br/><br/>Here is a picture:<br/><br/><br/>Which of these are possible?<br/><br/>My fingernails curve upwards/up. <br/>My fingernails point upwards/up. <br/><br/>My fingernails curve downwards/down. <br/><br/>My fingernails curve. (Does this mean 'point downwards'?<br/><br/>What is the opposite of the picture? Upward?<br/>Thank you