explaining the Proverb
does any body can explain me the meanning of these Proverbs.
1.He is wet behind the ears.
2.Jump the gun.
3.Keep one's ear to the ground.

Question

explaining the Proverb
does any body can explain me the meanning of these  Proverbs.
1.He is wet behind the ears.
2.Jump the gun.
3.Keep one's ear to the ground.

Answer

Wet behind the ears: crude, inexperienced, used to describe someone new or  young
Jump The Gun: get ahead of yourself or to start too soon
Ear to tje Ground:  Be or remain well informed; be on the watch for new trends and information

Answer

They're idioms, not proverbs. Proverbs possess some kind of wisdom, whereas idioms are simply non-literal.

The explanations you need are here:

http://idioms.thefreedictionary.com/wet+behind+the+ears
http://idioms.thefreedictionary.com/jump+the+gun
http://idioms.thefreedictionary.com/keep+one%27s+ear+to+the+ground