They sang the song well.

Meaning: This means that a group of people produced musical sounds with their voices in a good or satisfactory manner for a piece of music with words that are sung.

Choice of Words: They is a pronoun used to refer to a group of people. Sang means to produce musical sounds with the voice. The is an article used to refer to a specific thing. Song is a piece of music with words that are sung. Well means in a good or satisfactory manner.