Hi I want to ask which one is correct? <br/><br/>(1) "should your client fail to do this" or<br/><br/>(2) "should your client fails to do this".<br/><br/>To me I thought the #1 would be correct. But someone else used #2 instead.<br/><br/>Thanks for the help. <img class='emoticon' style='Width:19px;Height:19px;' data-delaysrc='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' src='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' alt='Emotion: smile'/>