Sentence examples for really difficult to perform from inspiring English sources

You know what medical procedure would be really difficult to perform?

Before, it was really difficult to do.

One reason is that it's difficult to perform.

The stent procedure is extremely difficult to perform.

But clinical trials are difficult to perform with children.

And it's really difficult to believe that the girls who are crying... on camera are always acting and performing.

"It's really difficult to tell".

It was really difficult to match them.

It just made it really, really difficult to break up.

"It's really, really, really difficult to enforce that," said Jonathan Adkins, spokesman for the Governors Highway Safety Association.

It was really difficult to defend.