When are shoes singular and when can they be regarded as plural?

"A pair of shoes" is a pair of shoes, and shoes are often used in the plural.

Reading? English ['? u:z]？ Beauty [? u？ z]？

Shoes (plural of shoes)

Wear shoes (the third person singular of shoes)

Lexical collocation:

Sports shoes? Sports shoes; Tourist sports shoes; Movable shoes; Air crack shoes

Fill someone's vacancy? Replace it; Satisfactory substitution; Satisfactory replacement; take one's seat/place

Leisure shoes? Casual shoes; Casual shoes; Fashion casual shoes; Casual leather shoes

Usage of words:

Shoe can also mean "brake shoe, brake shoe" or "something that looks like a shoe in appearance or use"

Shoe can also be interpreted as "horseshoe", that is, "horseshoe"

Example:

Blacksmiths spend most of their time repairing tools and shoeing horses.