3) (supplementary:) present participle vs. past participle

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Are you bored or boring?
source: Learn English with Rebecca         2009年1月30日

past and present participles
source: learnamericanenglish      2010-05-25

Past Participles and Present Participles
source: mrthoth    2007-07-18

How do you use past participles?
source: EnglishatDCU    2010-11-09

Adjective endings - ING or ED?
source: JamesESL English Lessons 2012年8月31日
quiz here: http://www.engvid.com/adjective-endin...

Participle adjectives | Adjectives ending in ING and ED

ing verbs and exercises of -ing forms, spelling rules and grammar
source: Crown Academy of English     2013年8月24日

4 ways to use -ING words
source: English Lessons with Adam      2017年4月18日
quiz at http://www.engvid.com/4-ways-to-use-i...

Participle versus gerund: A gerund functions as a noun, while a participle functions as an adjective. Secondly, there are a number of words which look like gerunds and participles though they are actually adverbial phrases.
source: MrSkypelessons      2017年6月1日

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