https://www.awelu.lu.se/language/common-problems-and-how-to-avoid-them/subject-verb-agreement/dependent-clauses-and-agreement-1/
Dependent clauses and agreement | Academic Writing in English
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https://bynext.com/tag/which-sentences-contain-dependent-clauses-select-two-options/
which sentences contain dependent clauses select two options Archives - ByNext
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https://www.awelu.lu.se/language/common-problems-and-how-to-avoid-them/subject-verb-agreement/dependent-clauses-and-agreement-1/
Dependent clauses and agreement | Academic Writing in English
dependent clausesacademic writingagreementenglish