gerund or infinitive. A,B,C exercise, scroll down

http://www.ompersonal.com.ar/omexercise/gerundioeinfinitivo/unit27.htm

http://www.englisch-hilfen.de/en/exercises/structures/gerund_infinitive.htm

conjunctions/ used to vs be used to

http://www.esltower.com/GRAMMARQUIZ/intermediate/conjunctions%20so,%20until,because,%20when.htm


http://www.smic.be/smic5022/used%20to.htm

conjunctions

http://www.english-4u.de/conjunctions_ex5.htm

51 connectors: choose nº 51 and click on start

http://www.roadtogrammar.com/welcome/

sentence transformation

http://esl.about.com/library/quiz/bltransform1.htm

listening, completion exercise

http://www.esl-lab.com/expense/expensefra.htm

passive voice

http://www.english-4u.de/passive_ex2.htm

countable and uncountable nouns

http://www.carmenlu.com/first/grammar/countable1_1.htm