Free morphemes fall into two catagories. The morphemes in the first category are called lexical morphemes and consist of the words carrying the content of the message. Examples: 'boy', 'man', 'house', 'tiger', 'yellow', 'look', 'break'. The morphemes in the second catagory are called functional morphemes and consist of the functional words in the langauge such as conjunctions, prepositions, articles and pronouns. Examples: 'and', 'but', 'on', 'near', above', 'in', 'the', 'that'.
according to above it not possible that you find A pharase (functional morphme) that be lexical.lexical and functional are belonge to diffenet category.