Are these sentences correct? and why please? Thanks tutor.<br/><br/><b>If Chris came/come onto the Lakers team, we will win the final.</b> <i> Do I put "came or come" and do I put comma after "team?"</i><br/><br/><b>If I was/were there I would have done that.</b> <i>Do I put "was or were" and do I put the comma after "there?"</i>