Modal verbs

http://www.curso-ingles.com/gramatica-inglesa/modales.php

Modals for Possibility

Modals for Possibility

Let’s learn about expressing possibility now.
The verbs may, might and could show possibility now and in the future. In this case, they have the same meaning.
Look at this conversation:

A: My mother said that it may snow tomorrow.
B: Really? It might snow?! That’s great! I could make a snowman or go for a “snow” walk.
A: Don’t get too excited. If the temperature is high, it may not snow. It may rain.
B: Well, I guess I could still go for a walk in the rain.

http://www.autoenglish.org/gr.may.i.htm 

To practice English pronunciation

http://cambridgeenglishonline.com/Phonetics_Focus/ 

http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/sounds/

http://www.uiowa.edu/~acadtech/phonetics/english/frameset.html 

the explanation for subject and object questions thing

http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/1535_questionanswer/page53.shtml

Tiza = chalk

Tiza = chalk. There you can hear the pronuntation: www.macmillandictionary.com/dictionary/british/chalk

Dictionaries

http://www.wordreference.com

http://www.macmillandictionary.com

Pronunciation of Niger

http://www.thefreedictionary.com/Niger