Regex to find the word before the word ending with "ing"

Hi,

I have the following string "This is my text string I know. I am loving it." I need to extract the previous word before those words which are ending with "ing" so in my sample I need the output as "text" and "am". How can I do it ?

#region Using Directives

using System;
using System.Text.RegularExpressions;

#endregion

public class Example
{
    static void Main()
    {
        string input = "This is my text string I know. I am loving it.";
        string regex = @"(\w+)(?=((\s)(?=([\w]+((?<=\w)ing\b)))))";
        var matches = Regex.Matches(input, regex);
        foreach (var match in matches)
        {
            Console.WriteLine(match);
        }
        Console.ReadLine();
        //Output: text 
        //        am
    }
}