Girl plays with doll happily.

Meaning: A young girl enjoys herself while playing with her doll.

Choice of Words: The girl is a young female child. Plays means to engage in an activity for enjoyment or recreation. With means in the company of or accompanied by. Doll is a toy figure representing a human being. Happily means feeling or showing pleasure or contentment.

Alternative Expressions

The girl is playing with her doll happily.

Meaning: This means the same thing as the first sentence: the girl is having fun playing with her doll.

Choice of Words: The girl is still the subject of the sentence, but this time we use the verb "is" to indicate that she is currently in the action of playing. The doll is still the object of the sentence, and happily is still an adverb that describes how the girl is playing.

The little girl plays with her doll with great joy.

Meaning: This means that the girl is really, really enjoying playing with her doll.

Choice of Words: We've added the adjective "little" to describe the girl, and we've changed the adverb "happily" to the noun phrase "with great joy" to emphasize how much the girl is enjoying playing with her doll.

Related Expressions