it's no use = hopeless / ineffective there is no need to = not necessary

- It´s no use - (or "it´s useless") This expression means that you´re not getting the results you want. "It´s no use, this key won´t fit into the lock" "It´s no use, no matter how hard I try, John will never be convinced." - There is no need to - (not "it is...") Means that something is not necessary. "There is no need to apologize, I know it wasn´t your fault." "There is no need to change the tires on your car, they are still in good condition."