1.Present participle as a noun: "Expressing opinions online" uses the present participle "expressing" as a noun, demonstrating a complex grammatical structure.
2.Relative clause: "People seek to connect with like-minded individuals, and sharing their thoughts helps them find common ground" uses a relative clause to provide additional information about "people," adding depth and complexity to the sentence.
3.Noun phrase as subject: "The feedback they receive, such as likes and comments" uses a noun phrase as the subject of the sentence, enhancing the richness and precision of the expression.
4.Present participle phrase as adverbial: "Engaging in online discussions" uses a present participle phrase as an adverbial to describe the action, adding complexity to the sentence.