CONDITIONALS

http://www.iesdamasoalonso.es/english/uploads/archives/Conditional-Sentences-IN.pdf

http://www.se-savigliano.unito.it/programmi/materiali/Adami/CONDITIONAL%20SENTENCES.pdf

http://learnwithsofa.com/grammar/alc2/conditionals.pdf

http://nanonano4.webs.com/condicionais%201%202%20e%203.pdf

http://www.e-grammar.org/download/if-clauses.pdf

http://teslden.com/wp-content/uploads/2009/08/conditional-wksht13.pdf

http://www.jamesabela.co.uk/intermediate/Grammar/Conditionals.pdf

http://www.bilbao.edu.mx/comunidad/preparatoria/wp-content/b5__tar_ing_003_071018.pdf

http://learnwithsofa.com/grammar/ilc6/the_second_conditional.pdf

http://downloads.bbc.co.uk/worldservice/learningenglish/quiznet/pdfs/qnet_146_conditionals_070816.pdf

PAST SIMPLE vs. PRESENT PERFECT

http://www.gimnazija-klasicna-salezijanska-ri.skole.hr/upload/gimnazija-klasicna-salezijanska-ri/multistatic/6/g2g_inter_unit14grey.pdf

http://www.autoenglish.org/tenses/gr.perf.pdf


http://fdslive.oup.com/www.oup.com/pdf/elt/catalogue/0-19-431519-3-d.pdf?cc=global&selLanguage=en

http://www.englisch-hilfen.de/en/download/test_simple_past_present_perfect_en.pdf

http://www.prolinguaassociates.com/Grammar_Review_Book/GRB_Unit_18.pdf

http://www.ihworld.com/ihjournal/articles/10PRESPERFECT.pdf

http://www.english-grammar.at/worksheets/tenses/t25.pdf

http://www.pearsonlongman.com/totalenglish/pdfs/downloads/pre-intermediate/preint_unit02_grammar03.pdf

http://www.perfect-english-grammar.com/support-files/present_perfect_or_past_simple_2.pdf

http://www.englishforeveryone.org/PDFs/Present%20Perfect%20Tense.pdf

http://www.bbc.co.uk/worldservice/learningenglish/flatmates/episode18/languagepoint.pdf

http://www.themlc.org/sites/9290fbae-86dc-4ed1-9fc8-7bfabe4766ba/uploads/5-6present_perfect_CD--id-.pdf

http://www.sprachenshop.de/sixcms/media.php/811/BusinessGrammarBuilder.pdf

VERB TENSES (general overview)

http://www.englisch-hilfen.de/en/grammar/tenses_table.pdf

http://www.sdc.uwo.ca/writing/handouts/Verb%20Tenses.pdf

http://www.bergen.edu/faculty/rfreud/verbtense.pdf

http://www.uhv.edu/ac/efl/pdf/verbstenses.pdf

http://owl.waol.org/handouts/verbtense.pdf

COMPARATIVES & SUPERLATIVES

https://www.esl-library.com/pdf/lessons/10.comparatives-superlatives.pdf

http://ies1libertas.edu.gva.es/departamentos/ingles/PDFs/tercero/ecomsu3e1.pdf

http://www.azargrammar.com/assets/fwg/FWGChapter13.pdf

http://www.anna-grammar.com/worksheets/AGW_comparative_elem.pdf