连词it that this its的用法,that连接词的用法

1;It,指代‘原物’I lost my pen but yesterday I find it. 2;That。‘那个’可以 引导定语从句，宾语从句，表语从句，同位语从句和主语从句，后四3;个叫名词性从句。1)I like that man .2)I knew her mother that is a singer. This。指“这个”This is my friend. 4;its译为‘它的’是形容词性物主代词。My dog, its tail is yellow.