The sentence "We had a picnic we played ball" is an example of a fused sentence, which is a grammatical error.
What is a fused sentence?
Sentences are fused if they include two or more independent clauses (complete ideas) without any word or grammatical symbol separating them.
Why is the sentence presented fused?
There are two clauses "we had a picnic" and "we played ball", however, there is not a linking word or any other element separating them.
Learn more about grammatical in: https://brainly.com/question/21055523
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