1
Can you give me an example?
To sign this, you can sign 'YOU', 'GIVE-ME', and then perform the sign for 'example' by tapping your index finger against your flat palm twice. Raise your eyebrows at the end to indicate a yes/no question.
2
For example, I like dogs.
Start your sentence with the sign for 'example', then point to yourself for 'I', sign 'like' by pulling your thumb and middle finger from your chest, and finish with the sign for 'dogs'.
3
That is a good example.
Point to the concept for 'that', sign 'good' by moving your flat dominant hand from your chin down to your non-dominant hand, and finish with the double-tap for 'example'.