English Grammar/Subject and Predicate/Direct and Indirect Objects

DIRECT OBJECT -It is the person or things that directly receives the action or effects of the verb.It answers the question what or whom

   © What type - direct 
   ®Whom type - indirect 

Ex- He gave a necklace to his wife

  Here necklace is using what - so it is direct object 

And the wife is using whom - so it is indirect object