PRESENT SIMPLE/PRESENT CONTINUOUS

1) Use

Simple Present	Present Progressive/Continuous
repeated actions, habits	actions happening at the moment of speaking or around the moment of speaking
fixed arrangements, scheduled events (e.g. timetable)	fixed plan in the near future
sequence of actions in the present (first - then, after that) and instructions	temporary actions

2) Signal words

Simple Present	Present Progressive/Continuous
always, often, usually, sometimes, seldom, never, every day, every week, every year, on Mondays	now, at the moment, Look!, Listen!

3) Form

Simple Present	Present Progressive/Continuous
infinitive 3rd person singular: infinitive + -s I play football. He plays football.	to be (am, are, is) + infinitive + -ing I am playing football. He is playing football.

EXERCISES
http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive.htm
http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive2.htm
http://www.ego4u.com/en/cram-up/grammar/simpre-prepro/exercises

PAST SIMPLE/PAST CONTINUOUS

1) Use

Simple Past	Past Progressive
action finished in the past (single or repeated)	action was in progress at a special time in the past
series of completed actions in the past	two actions were happening at the same time (the actions do not influence each other)

2) Form

Simple Past	Past Progressive
regular verbs: infinitive + -ed irregular verbs: 2nd column of the table of the irregular verbs I played football.	(was or were) + infinitive + -ing I was playing football.

EXERCISES

http://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex07

http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_progressive2.htm

PRESENT PERFECT - PAST SIMPLE

1) Use

Present Perfect	Simple Past
Result of an action in the past is important in the present	action finished in the past
Recently completed actions	series of completed actions in the past
Actions beginning in the past and still continuing	together with the Past Progressive/Continuous - The Simple Past interrupted an action which was in progress in the past.
together with lately, recently, yet

2) Signal words

Present Perfect	Simple Past
just, yet, never, already, ever, so far, up to now, recently, since, for	yesterday, last week, a month ago, in 2002

3) Form

Present Perfect	Simple Past
have/has + past participle I have played football.	regular verbs: infinitive + ed irregular verbs: 2nd column of the table of the irregular verbs I played football.

EXERCISES
http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/ppvpast1.htm
http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=1496
http://www.perfect-english-grammar.com/past-simple-present-perfect-1.html
http://www.curso-ingles.com/ejercicios-test-ingles/present-perfect-past-simple.php

FOR/SINCE/AGO

http://www.curso-ingles.com/ejercicios-test-ingles/for-since-ago.php

http://www.englisch-hilfen.de/en/exercises/confusing_words/since_for.htm

ALREADY/JUST/YET/STILL

http://learnenglish.britishcouncil.org/es/grammar-reference/just-yet-still-already
http://autoenglish.org/gr.presper.i.htm
http://baladre.info/english/sedaviwebfront/yetstill2.htm

FUTURE TENSES

Simple Present	Present Progressive	Be going to	Future simple (will+ infinitive)
future action is fixed (e.g. timetable)	planned action in the near future	planned action in the future; logical consequence (sth. is going to happen)	predictions, sudden decisions spontaneous action
The train leaves at 6.45.	I am going to a party tonight.	We are going to fly to Leeds in summer.	He will carry this bag for you.

E

EXERCISES

https://elt.oup.com/student/solutions/preint/grammar/grammar_06_012e?cc=global&selLanguage=en

http://www.better-english.com/grammar/willgo.htm

http://www.englishpage.com/verbpage/verbs18.htm

Comparative and superlative

http://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises

http://www.practicaingles.es/new-exercises/ex-comparative-superlative/

http://www.learnenglish-online.com/grammar/tests/superlativecomparative.html

RELATIVE CLAUSES

Relative pronouns- filling in.

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-9423.php

http://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns.htm

http://www.englisch-hilfen.de/en/exercises/pronouns/relative_pronouns2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=6084

http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?02

http://www.englishexercises.org/makeagame/viewgame.asp?id=872

Relative pronoun - necessary or not?
http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?10

Relative sentences - joining.
http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?09

http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?12

http://www.ego4u.com/en/cram-up/grammar/relative-clauses/exercises?08

INDEFINITE PRONOUNS

http://www.englishexercises.org/makeagame/viewgame.asp?id=1761
http://www.autoenglish.org/gr.anythin.i.htm

http://www.grammarbank.com/indefinite-pronouns-exercise.html

CONDITIONAL SENTENCES

	If- clause	Main clause
TYPE 1	present simple	Future simple (will + infinitive)
TYPE 2	past simple	Conditional simple (would + infinitive)
TYPE 3	past perfect (had + p.p.)	Conditional perfect (would have + p.p.)