Sentence examples for not been successful from inspiring English sources

However, previous campaigns have not been successful.

Such tactics have not been successful everywhere.

But those requests have not been successful.

The covert war has not been successful".

Similar efforts have not been successful.

But they have not been successful.

"We've not been successful yet," he admitted.

Those drugs have not been successful.

"The initiative has not been successful," he told reporters afterward.

not been successful within a reasonable period of time.

This approach, however, has not been successful for anionic substrates.