Kids will study at home on computers.为什么computer要加s?

Kids will study at home on computers.为什么computer要加s? kids will study on computers at home They will study at home on computers .为什么home 不加s呢? will kids study at home on computers?作否定回答 kids will study at home on computer 中文意思 词成句（英语连）1.kids,at,study,home,computers,will,on.2.be,more,wil i think kids will study at home on computers改为否定句 翻译；Will kids study at home on computers in 100 years? will kids study at home on computer?（作否定回答） The kids will use computers for study at home.The kids will kid will study at home on computer?, The kids use computers( )(study)at home.