Adjectives and nouns - http://www.ecenglish.com/learnenglish/lessons/noun-and-adjective-forms
and http://www.englisch-hilfen.de/en/word_formation/nouns_adjectives/index.php
blog about it

Tag Questions

You need to learn English, don't you? You listened to those podcasts that I had applied to you, last week, didn't you? You will do your best to improve your English skills, won't you?
So, in order to confirm what you say, you must use this special grammatical structure. It's a statement followed by a mini-question that we usually call it "tag question". 
They're really interesting because you grab the person who's you're talking to attention. 
Look at these structures:


- She should go to the doctor, shouldn't she?
- They have been playing video game for hours, haven't they?
- He is the new teacher, isn't he?
- You told the truth to you parents, didn't you?
- He will buy a new car next year, won't he?
- The cat is under the bed, isn't it?
- It's raining, isn't it?
- We went to the movies, didn't we?
- That child can play soccer right now, can't he/she?
- Those people could protect the environment, couldn't they?


Got them? So, here there are some useful links to learn more and practice: English Club (explanation), English Club (activities), Learn English (explanation), English Hilfen and Better English (both activities).