我的语法书是这样写的:S+V:The sun rises in the east.S+V+O:My brother bought a new cellphone.S+V+P:The grass turns green.S+V+Oi+Od:My father gave me a gife.S+V+O+C:He made the baby laugh.请问:P Oi Od分别是什么意思,在句中有什么作用?谢谢了~