<i>Could you tell me how I <b>choose </b>the best singer.</i><br/><br/>We can use the present simple to express a habit/no particular time (see above).<br/><br/>Can we express a habit/no particular time frame with modal tenses also?<br/><br/><i>Could you tell me how I <b>should choose</b> the best singer.</i><br/><br/>Or does this express a particular time?<br/><br/>Thanks