Watch the Level 1: Blues Bends online guitar lesson by Jeff McErlain from Take 5: Blues Bends
In this exercise, I'm using whole step bends as we discussed earlier and I'm also outlining the chord changes with those bends. My first chord is A7, and I'm bending the G to the A, which is the b7 to the root of the A7 chord. A-C#-E-G, then I bend the D to the E, giving me the 5th of the A7 chord.
On the D7 chord, I can still use the A bend and release the E to the D, both of which are part of the D7 chord: D F# A C.
On the E7 chord, E-G#-B-D, I can use the D to E bend. So really, using those bends I can outline the changes in a blues.