PRESENT SIMPLE:

https://ngl.cengage.com/assets/downloads/grex_pro0000000538/grex1_su3.pdf

https://xioenglish.files.wordpress.com/2014/10/present-simple.pdf

https://www.englisch-hilfen.de/en/download/test_simple_present_en.pdf

PRESENT CONTINUOUS:

https://learnenglish.britishcouncil.org/english-grammar/present-continuous

https://www.perfect-english-grammar.com/support-files/present_continuous_all_forms_exercise_1.pdf

https://viancep2012.files.wordpress.com/2012/11/present-continuous.pdf

PRESENT SIMPLE / PRESENT CONTINUOUS:

test_simple_present_progressive_en.pdf

https://www.perfect-english-grammar.com/support-files/present_simple_or_present_continuous_3.pdf

https://bbresources.s3.amazonaws.com/sites/3/Grammar-PresentSimplePresentCont_2663.pdf

http://www.macmillaninspiration.com/new/files/2010/12/Grammar-EXTRA_NI_3_Unit_1_Present-simple_present-continuous_and-adverbial-phrases-of-frequency1.pdf