What is the difference between include, involve, consist and contain?

What is the diffrence between ‘include’ ‘involve’ ‘consist’ and ‘contain’ in meaning and using? Can anyone help me?
Thanks in advance!

include’ ‘involve’ ‘consist’ and ‘contain’
Contain: The CD contains all the lessons.
The glass contains milk in it.

Thanks a lot, your explanation is not sufficient though.

Hi TMH

Have a look at these definitions and the accompanying example sentences:

After you’ve done that, I would suggest you try writing a few sentences of your own, and then post them here for comment.
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Hi Yankee,
Thanks for responding me. It’s quite difficult for me to tell them apart. However I’ll try to do according to your suggestion. :slight_smile: