Keys problem!!!

Physics
1

Hi, I am currently scripting a vehicle, and this is the base code, of course, I am going to modifiy it, but for instance this is working, just if multiple keys are not pressed at once, if W and A are pressed at the same time nothing happens, help?Thanks in advance, here’s the code:

	    if(Input.GetKey(KeyCode.W))
		{
			rigidbody.AddForce(transform.forward * CarSpeed, ForceMode.VelocityChange);
		}
		if(Input.GetKey(KeyCode.S))
		{
			if(CurPos!=LastPos)
				rigidbody.drag=5;
		}
		if(Input.GetKey(KeyCode.A))
		{
			    CarPosY-=0.2f;	
				rigidbody.transform.eulerAngles=new Vector3(CarPosX,CarPosY,CarPosZ);
		}
		if(Input.GetKey(KeyCode.D))
		{
			    CarPosY+=0.2f;	
				rigidbody.transform.eulerAngles=new Vector3(CarPosX,CarPosY,CarPosZ);
		}
		LastPos=CurPos;
2 
if(Input.GetKey(KeyCode.W)  Input.GetKey(KeyCode.A))
{
    // code here
}