error CS1525: Unexpected symbol `{'

Questions & Answers
1

I just started at this and I can’t find the problem can someone help me?
Problem is at this part if:

((Input.GetKey (“w”) (Input.GetKey (“shift”)))
{
rb.AddForce (0, 0, forwardForceShift * Time.deltaTime);
}

using UnityEngine;

public class PlayerMovement : MonoBehaviour {

public Rigidbody rb;

public float forwardForceShift = 1000f;
public float forwardForce = 500f;	
public float sidewaysForce = 500f;  

void FixedUpdate ()
{

	if ((Input.GetKey ("w") (Input.GetKey ("shift"))) 	
    {
			rb.AddForce (0, 0, forwardForceShift * Time.deltaTime);
	}

	if (Input.GetKey("w"))	
	{
		rb.AddForce(0, 0, forwardForce * Time.deltaTime);
	}

	if (Input.GetKey("d"))	
	{
		// Add a force to the right
		rb.AddForce(sidewaysForce * Time.deltaTime, 0, 0);
	}

	if (Input.GetKey("a"))  
	{
		// Add a force to the left
		rb.AddForce(-sidewaysForce * Time.deltaTime, 0, 0);
	}
}

}

2

if (Input.GetKey (“w”) && (Input.GetKey (“shift”))
{
rb.AddForce (0, 0, forwardForceShift * Time.deltaTime);
}