This broken pencil is useless and cannot be used for writing anymore.
I don't like this app, it's useless and it crashes all the time.
The umbrella is useless when it is not raining outside.
I tried to fix my computer by myself but it was useless, I had to take it to a professional.
I find this old book to be useless, as it does not contain any relevant information.
Learning a foreign language without practicing conversation is useless.
This old phone is useless, I can't even take decent pictures with it.
This instruction manual for the new device is useless, I can't understand a thing.
I try not to waste time on useless arguments with my friends.
Worrying about what other people think is useless, just be yourself!
It's useless to argue with him; he never changes his mind.
His advice was useless, as it didn't help us solve the problem.
The broken vase was now useless, and it could no longer be used as a decoration.
I realized the course I paid for was useless, as I already knew everything it covered.
The old computer just sits in the corner, useless and taking up space.
I found the meeting to be useless because we didn't make any progress on the project.
The travel guide was useless because it didn't include any information about local customs and traditions.
The math course was useless to me because I already knew the material.
The instructions on the package were useless, and I couldn't figure out how to assemble the furniture.
The old phone was completely useless, and I had to buy a new one.
She tried to fix the broken vase with glue but it was useless; the pieces simply wouldn't hold together.
Despite his best efforts, the project was deemed useless by the higher-ups and was ultimately scrapped.
The outdated technology in our office is so useless that it takes twice as long to complete even simple tasks.
Sitting through that boring lecture was a useless waste of my time and I couldn't wait for it to end.
That old sports injury has left me with a useless knee that often gives out when I try to run or jump.
After trying several different remedies, John came to the conclusion that the over-the-counter medication was completely useless in treating his allergy symptoms.
The cotton candy machine we purchased for the party turned out to be useless, as it failed to spin any cotton candy at all.
Despite spending hours researching and preparing for the exam, Sarah found the textbook to be completely useless in helping her pass.
The customer service representative was so unhelpful that I found their assistance completely useless.
The old computer we inherited from the office was so slow and outdated that it was virtually useless for the tasks we needed to perform.