http://owl.english.purdue.edu/owl/resource/627/04/
http://www.learnenglish.de/grammar/verbsgerund.html
http://grammar.about.com/od/basicsentencegrammar/a/verbalswhat.htm
http://www.englishpractice.com/grammar/participles-gerunds-exercise/
www.writingcentre.uottawa.ca/hypergrammar/bldphr.html
www.gsu.edu/~eslhpb/grammar/lecture_9/nonfinite.html
www.ucl.ac.uk/internet-grammar/clauses/ex2.htm
http://hss.fullerton.edu/english/aeg/Chap-11.pdf
www.usingenglish.com › Reference › Glossary › N
www.gsu.edu/~eslhpb/grammar/lecture_9/nonfinite.html
Oshima, A. and Hogue, A. Writing Academic English. 4th Edition. Pearson Education, NY 2006, Ch. 15.
Index
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Resources and Useful Links
