How to have multiple animations (Walk, run, idle)?

I have four animations; idle, walk, run and grab.

I want to attach each to there own key (walk = "W" and so on), but my code does not work when I run the game.

When I play the game, the model only does the grabbing animation.

When I made these in maya, i did a separate model for each animation, but i do not think that is the problem. using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class PlayerMoveScript : MonoBehaviour
 {
     
         Animator anim;
         int GrabHash = Animator.StringToHash("Grab");
         int WalkHash = Animator.StringToHash("Walk");
         int RunHash = Animator.StringToHash("Run");
        
 
         void Start ()
         {
             anim = GetComponent<Animator>();
         }
 
 
         void Update ()
         {
            // float move = Input.GetAxis ("Vertical");
             //anim.SetFloat("Speed", move);
             
 
            // AnimatorStateInfo stateInfo = anim.GetCurrentAnimatorStateInfo(0);
             if(Input.GetKeyDown(KeyCode.E))
             {
                 anim.SetTrigger (WalkHash);
             }
             else if(Input.GetKeyDown(KeyCode.W))
             {
                 anim.SetTrigger (RunHash);
             }
             else if(Input.GetKeyDown(KeyCode.G))
             {
                 anim.SetTrigger (GrabHash);
             }
         }
     
 }