Another topic that i would like to share is on Idioms in English. Some of the examples of idioms are:

A hot potato
Speak of an issue which many people are talking about and which is usually disputed

A penny for your thoughts
A way of asking what someone is thinking

Actions speak louder than words
People's intentions can be judged better by what they do than what they say.

Add insult to injury
To further a loss with mockery or indignity; to worsen an unfavorable situation.

An arm and a leg
Very expensive or costly.

 A large amount of money. At the drop of a hat
Meaning: without any hesitation; instantly.

Back to the drawing board
When an attempt fails and it's time to start all over.

Ball is in your court
 It is up to you to make the next decision or step

Barking up the wrong tree
 Looking in the wrong place.

Accusing the wrong person
Be glad to see the back of

Be happy when a person leaves.
Beat around the bush

Avoiding the main topic.
Not speaking directly about the issue.

Best of both worlds
Meaning: All the advantages.

Best thing since sliced bread
A good invention or innovation. A good idea or plan.

Lots more where that came from . You can download them from :
http://www.smart-words.org/quotes-sayings/english-idioms-commonly-used.pdf