this,is和is.this怎么区分谁在谁在后,这是我的狗,this,is,my,dog但能不能is,this,my,

this,is和is.this怎么区分谁在谁在后,这是我的狗,this,is,my,dog但能不能is,this,my, this is my dog,的同义句怎么改 This is my sister and this is my brother 能不能写成this is my sis This is my love This is my moment This is my decision ... this is my school this is my head this is my dj This is my JSP this is my favourite This is my timetable__Sunday__Saturday