Sure, from your settings page, you can choose not to automatically claim games on time. Just uncheck this box: 
Giving my opponent more time
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Sep 22, 2014
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#2
I'm getting bored winning chess games based off of my opponent running out of time, is there a way for me to give them more time if I choose? I know there are options out there (like pre-moving) that aren't overtly advertised so I'm hoping this might also be possible, thanks!