I have a toy car.
Meaning: This means that the speaker owns a toy that is a representation of a vehicle used for transportation. It's like saying, I am the owner of a toy that looks like a car.
Choice of Words: I indicates the speaker. Have indicates possession or ownership. A indicates one. Toy is an object for children to play with. Car is a vehicle with wheels that is used for transportation. Together, "I have a toy car" expresses the speaker's ownership of a toy vehicle.
Alternative Expressions
Related Expressions