Bring 7 cups water and sugar to a boil in a large saucepan, stirring constantly. Pour over tea bags, and steep until cool.
Remove tea bags from liquid, squeezing gently.
Stir together tea, lemonade concentrate, strawberries, and tequila in a large bowl; cover and freeze 8 hours, stirring occasionally. Serve immediately, or stir in lemon-lime soft drink, if desired.