Pitfalls in English

Word order
overview
http://faculty.washington.edu/marynell/grammar/AdverbPl.html
overview
http://marksesl.com/grammar/Adverb_Chart.htm
background + exercise
http://grammar.ccc.commnet.edu/grammar/adverbs.htm


Commas
http://grammar.ccc.commnet.edu/grammar/commas.htm


Prepositions
http://owl.english.purdue.edu/handouts/esl/eslprep2.html
Prepositions on the Internet

1. Better Englísh

Under Miscellaneous kan du finde flere øvelser med ’prepositions’

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

2. English Learner

Under Intermediate er der 2 øvelser.

http://www.englishlearner.com/tests/test.html

3. Owl Online Writing Lab

Gå ned i bunden af siden. Her er 4 øvelser.

http://owl.english.purdue.edu/handouts/grammar/index.html

4. Online Exercises

7 øvelser med prepositions under overskriften Grammar

http://www.smic.be/smic5022/Onlineexercises.htm

5. 200 Grammar Topics

Læs introduktion, studér tabellerne og lav øvelserne.

http://web2.uvcs.uvic.ca/elc/studyzone/200/grammar/prepo.htm

6. About.com

Der ligger øvelser i prepositions rundt omkring på denne side.

http://esl.about.com/library/quiz/blgrammarquiz.htm


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


Uncountables
http://www.ucl.ac.uk/internet-grammar/nouns/count.htm


Agreement

The exercises get more difficult the further down you go

If you need some basic knowledge about agreement, look at this page and print the factsheets:
http://www.bbc.co.uk/skillswise/words/grammar/sentencebasics/verbsubjectagreement/

Exercises:
http://www.eslcafe.com/quiz/sva1.html
http://a4esl.org/q/h/9901/cw-svagreement.html
http://www.cityu.edu.hk/elc/quiz/subverb1.htm

Read more here and do the exercise at the end of the page:
http://owl.english.purdue.edu/handouts/esl/eslsubverb.html

More exercises can be found here:
http://grammar.ccc.commnet.edu/grammar/quiz_list.htm
Subject-verb agreement are dealt with in exercises 31-39

False friends
Good hints
http://www.wsu.edu/~brians/errors/errors.html
http://andromeda.rutgers.edu/~jlynch/Writing/