What are examples of a motif sentence?

A motif is a dominant idea or central theme. For example, the Word "nevermore" in Edgar Allen Poe's "The Raven" would be a motif because it is repeated at the end of each stanza.

Some other examples would be:

"The sonata had a softly repeating motif in the bass clef."

"The painted motif on the wall reminded Sally of the one in her own home."

In all, you want to remember that a motif is related to something that is repeated for emphasis or is the main point of a piece of literature, music, art, speech, etc.