I.E.S. Siglo XXI English Department

To check the answers to unit 6 WB exercises, click here

UNIT 5.- ANSWER KEY, click here

To see answer key to unit 5 click here

check your workbook answers for unit 4 here

To check the answers to verb tense rephrasing, click here

to check your workbook answers to unit 2, click here

Using  modal verbs  can be difficult. Here are some easy explanations and lots of exercises . http://www.perfect-english-grammar.com/modal-verbs.html - Using Modals for Recommendations http://examenglish.com/grammar/b1_modals_recommendations.htm -  May Might and Adverbs of Probability http://examenglish.com/grammar/b1_may_might.htm -  Using Modals for Recommendations http://examenglish.com/grammar/b1_modals_recommendations.htm