3RD SYSTEMS- SCIENCES B

Video about modal vrbs
https://www.youtube.com/watch?v=60Ybwf5H9LE
Homework
Check the use of modals
http://www.myenglishpages.com/site_php_files/grammar-lesson-modals-present-past.php#.U_Im9sV5OjE

EXERCISES
http://www.myenglishpages.com/site_php_files/grammar-exercise-modals.php#.U_InPsV5OjE