In my Swedish grammar book, a comma is placed before <b>that</b> in a defendant clause.<br/><br/>For example:<br/><br/>Jag vet, att du är inte min vän <br/><br/>I know, that you are not my friend.<br/><br/>I want to know if the same applies in English too. Should a comma be placed before <b>that </b>as in this sentence?