關於「verb + ing rules」標籤，搜尋引擎有相關的訊息討論：

ing verbs English lesson and exercises -ing forms, spelling rules ...www.youtube.com › watch › v=pbREb-BOj4YING Spelling rules – Spelling of verbs ending in ING in Englishwww.youtube.com › watch › v=QwVWTBzb6YYSpelling Rules -ING - Woodward English Grammarwww.grammar.cl › Notes