Unit+1

__**Past tenses and present perfect**__
http://www.english-4u.de/pres_perf_ex4.htm http://a4esl.org/q/f/z/zz29bms.htm [|http://leo.stcloudstate.edu/grammar/tenses.html]
 * Review of all tenses **

__**Polite requests for information (also called embedded questions or indirect questions)**__
http://www.tillyer.net/GLOW/fsi201.htm http://a4esl.org/q/h/vm/indirectques.html

__**Conditionals**__
**Zero conditional** http://web2.uvcs.uvic.ca/elc/StudyZone/330/grammar/0cond.htm

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/1cond1.htm http://www.englishgrammarsecrets.com/firstconditional/menu.php
 * First conditional **

http://web2.uvcs.uvic.ca/elc/StudyZone/410/grammar/2cond.htm http://www.better-english.com/grammar/condit23.htm
 * Second conditional **

**Zero Vs first conditional** http://www.stclaresenglish.net/langprac/conmixrulz.htm

**First Vs second conditional** http://speakspeak.com/html/d3b008_english%20grammar_intermediate_first_second_conditional.htm http://wwwedu.ge.ch/cptic/prospective/projets/anglais/exercises/condit1.htm