1The new marketing strategy proved ineffective in increasing sales, and the company had to rethink its approach.
2Is the current policy on climate change ineffective in reducing carbon emissions, or are there other factors at play?
3The team's ineffective communication led to misunderstandings and delays in the project timeline.
4Critics argue that the government's measures to address poverty have been ineffective and that a more comprehensive approach is needed.
5Researchers found that the new medication was ineffective in treating the disease, and further testing is required to identify a viable alternative.