error cs0120

Im having trouble with my scripting. I use c#.

Here are the following errors:

Assets/CArrrrr.cs(20,25): error CS0120: An object reference is required to access non-static member UnityEngine.Transform.Rotate(UnityEngine.Vector3)' and Assets/CArrrrr.cs(22,22): error CS0120: An object reference is required to access non-static member UnityEngine.Transform.Rotate(UnityEngine.Vector3)'

using UnityEngine; using System.Collections;

public class CArrrrr : MonoBehaviour {

// Use this for initialization void Start () {

 }
 
 // Update is called once per frame
 void Update () {
   if(Input.GetKey( KeyCode.W) ) {
      transform.position += transform.forward * 5.0f * Time.deltaTime; }
   
   if(Input.GetKey( KeyCode.S) ) {
      transform.position -= transform.forward * 2.0f * Time.deltaTime; } 
   
   if(Input.GetKey( KeyCode.A) ) {    
       Transform.Rotate( 0.0f, -80.0f * Time.deltaTime ) ; }

   if(Input.GetKey( KeyCode.D) ) {
        Transform.Rotate( 0.0f, 80.0f * Time.deltaTime ) ; 
     } 
 }

}

Someone plz help!