Previous Month ITC to Claim in Next Month

For Example :

Month : April  -- ITC 1000 /- -- Showing In GSTR2B > But Not Claimed

Can we Claim above mentioned ITC in May ( Not Showing in GSTR2B  ) ?

Question: If  Yes , then How to Declare in  May - GSTR3B -  that this ITC is 

                already Appeared in GSTR2B in April 

Please reply ... best regards