Present simple vs present continuous

http://www.englisch-hilfen.de/en/exercises/tenses/present_progressive_auxiliaries2.htm

http://www.kico4u.de/english/uebungen/aktiv/preprog1.htm

http://www.focus.olsztyn.pl/en-present-continuous-tense-examples.html#.WNnQD4E18dU

https://www.ego4u.com/en/cram-up/grammar/present-progressive/form/exercises?form04

Going to

http://www.agendaweb.org/exercises/verbs/going-to-write

http://www.agendaweb.org/exercises/verbs/going-to

http://www.kico4u.de/english/uebungen/5klasse/going.htm

http://www.agendaweb.org/exercises/verbs/going-to-questions

http://saberingles.com.ar/curso/lesson11/07.html

http://www.agendaweb.org/exercises/verbs/going-to-write-2

http://www.agendaweb.org/exercises/verbs/going-to-write

Possessive case

http://www.englishexercises.org/makeagame/viewgame.asp?id=2452

http://www.englisch-hilfen.de/en/exercises/nouns_articles/apostroph

https://www.ego4u.com/en/cram-up/grammar/nouns/exercises?04

https://engelsklaslokaal.nl/en/english-grammar-exercises/miscellaneous/possessives-s-of/

http://www.english-4u.de/poss_case_ex1.htm
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-4640.php

Present continuous

http://www.agendaweb.org/verbs/present-continuous/index.html

http://www.montsemorales.com/gramatica/PresCont0.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2357

http://www.kico4u.de/english/uebungen/5klasse/presprofrag.htm

Simple Present

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/pres1.htm

http://www.englishmaven.org/HP6/Present%20Tense%20Exercise%206.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2975

http://www.montsemorales.com/gramatica/PresSimp5.htm

http://www.montsemorales.com/gramatica/PresSimp4.htm

http://www.eflnet.com/grammar/presentagreement.php

Numbers

http://s.mound.free.fr/skyblues67/numbers/numbers1.htm

http://s.mound.free.fr/skyblues67/numbers/numbers2.htm

http://www.vocabulary.cl/Games/Numbers_Verb 1-100.htm  

Clothes

http://www.agendaweb.org/exercises/vocabulary/clothes/clothes-1.htm

http://www.agendaweb.org/exercises/vocabulary/clothes/clothes-multiple

http://www.eflnet.com/vocab/dictionary/clothing_quiz2.php

http://www2.arnes.si/~oskplucija4/younglearners/CLOTHES1.htm

Nationalities

http://www.manythings.org/wbg/nationalities-mw.html

http://www.manythings.org/wbg/nationalities-sw.html

http://www.englishlearner.com/beginner/nationalities-crossword-1.shtml

This - That

http://www.agendaweb.org/exercises/grammar/demonstratives/this-that

This - That - These - Those

http://www.agendaweb.org/exercises/grammar/demonstratives/this-that-these-those

There is - There are

http://www.englisch-hilfen.de/en/exercises/various/there_is_there_are.htm

There is - There are

http://www.agendaweb.org/exercises/grammar/there-is-there-are.htm

There is - There are

http://www.agendaweb.org/grammar/there-is-there-are/index.html

Many - Much

https://www.ego4u.com/en/cram-up/vocabulary/much-many/exercises

Many - Much

http://www.agendaweb.org/exercises/grammar/countable-uncountable/many-much

Countable Nouns

http://www.montsemorales.com/gramatica/CountableSpot1-6.htm

Countable Nouns

http://www.carmenlu.com/first/grammar/countable1_1.htm

Uncountable Nouns

http://a4esl.org/q/j/km/mc-noncount.html

Prepositions (Time)

http://www.agendaweb.org/exercises/grammar/prepositions/time-1

Prepositions (Place)

http://www.groovetoenglish.com/placeprep.htm

Prepositions

http://s.mound.free.fr/skyblues67/prepositions/preposqcm.htm

Prepositions (Place)

http://www.agendaweb.org/exercises/grammar/prepositions/place-2