what is the complete subject , a person must have very good eyesight to work with beads.

The complete subject is "A person."

what is the complete subject , artist use a needle and thread to attach beads to clothing.

What do you think the complete subject is?

Who is doing the action?

the artist

Right. Artist is the complete subject.

The complete subject of the sentence "A person must have very good eyesight to work with beads" is "a person."

To identify the complete subject in a sentence, you need to identify the subject of the sentence and any words or phrases that modify or describe it. In this case, the subject is "a person," which refers to an individual. It is the main noun that the rest of the sentence is about.

The word "must" is a helping verb, and "have" is the main verb. "Very good eyesight" is a noun phrase that acts as an adjective, describing the type of eyesight a person needs. Finally, "to work with beads" is an infinitive phrase that functions as an adverb, explaining the purpose or reason for needing good eyesight. However, these words do not make up the complete subject.

Therefore, the complete subject of the sentence "A person must have very good eyesight to work with beads" is simply "a person."