The fourth answer "Tim ate dinner, so he watched a movie" used the compound predicate correctly.
Let first understand that a "compound predicate" is said to occur in a complete sentence when two or multiple verbs share the same subject.
- A typical example is John "walks along the road" and "admire the cars". The bold word are the compound predicate.
In conclusion, Tim ate dinner, so he watched a movie is the correct answer because the subject have two verbs "ate" and "watched".
Learn more about compound predicate here
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