Practice on vocabulary unit 1

There are 26 letters in the English alphabet. They have two forms : Capital letters and small letters  like this :
Capital letters :        A  B  C  D  E  F  G  H  I  J  K  L  M
                             a  b   c   d   e  f   g    h   i  j   k   l   m

                             N  O  P  Q  R  S  T  U  V  W  X  Y  Z
                             n   o  p   q   r  s   t   u   v  w  x   y  z
Here are some videos from YouTube to show you how to pronounce them. We recommend you to watch them carefully.
***( video 1 show the sounds of all letters , the other videos show the sounds of groups of letters together)

Video 1

                  Other videos ( the sounds of groups of letters)