9C2015grammar: conjunctions + formal vs informal style
Grammar exercises
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/subcon1.htm
Konjunktioita
http://www.autoenglish.org/writing/formalandinformalexercise.htm
Formal vs informal language
http://www.ecenglish.com/learnenglish/lessons/subordinating-conjunctions/
Konjunktioita
http://www.esolcourses.com/content/englishforwork/quizzes/a/2/quiz2.html
Formal vs informal language
http://www.flo-joe.com/cae/students/writing/register/index.htm
Formal vs informal language
http://www.learnenglishfeelgood.com/english-grammar-conjunctions2.html
Konjunktioita
http://www.learnenglishfeelgood.com/english-subordinating-conjunctions2.html
Konjunktioita