please tell me how to show the opportunity fields value show in VF pags

<apex:page standardController="Opportunity">
    <apex:form>
        <apex:pageBlock>
            <apex:pageBlockSection>
                  <apex:inputfield label="Name" value="{!Opportunity.Name}" />
                  <apex:inputfield label="StageName" value="{!Opportunity.StageName}"/>
                  <apex:inputfield label="Account Name" value="{!Opportunity.Accountid}"/>     
              </apex:pageBlockSection>
         </apex:pageBlock>
      </apex:form> 
</apex:page>

If this helps mark