My sister's hobby is collecting stamps.为什么sister后面要加's,为什么collect后面ing,为什么stamp后面要加s?

1.（ ）bikes is my sister's hobby.写出括号里的单词, 【 】 stamp is my sister hobby a、collecting b、collects My sister's hobby is collecting stamps.为什么sister后面要加's,为什么collect后面ing,为什么stamp后面要加s? My mother's s.is my sister. 怎样写同义句 如1.I like swimming.2.Her hobby is playing the violin.3.My brother likes playing football.4.Alice is Ann's twin sister.5.what do you like?6.What's his hobby MY father's sister is my My sister is my mother's( ) MY father's sister is my my father's sister is my a________ My sister's daughter is my ( ) 写出问句.Amy's hobbies are singing and dancing. Tom likes playing sports.His hobby is playing the pipa.My sister likes swimming swimming,hobby,my,is. My favorite hobby is my hobby is painting. my sisterhobby写一篇英语作文 My father's hobby is fishing的同义句 My father's hobby is g___ flowers 该填什么 my father's hobby is fishing转划线提问