He completed the piano performance without making any mistakes.

His way of speaking is affected, lacking in naturalness.

He made a careless mistake in the test.

He practices every day to learn new skills.

By participating in that project, he was able to give some dignity to his career.

I was surprised by his ill-bred attitude.

I can't stand his impudent attitude.

He tied the rope to the tree.

He likes to put on airs in front of his new friends.

Police dogs are very effective in tracking criminals.