something everthing 是单数还是复数?后面的be动词用is还是are?somewhere和everywhere也一样吗?somebody和everybody是单数还是复数?someone和everyone和somebody everybody一样吗用they还是it代替

问题描述:

something everthing 是单数还是复数?后面的be动词用is还是are?somewhere和everywhere也一样吗?
somebody和everybody是单数还是复数?someone和everyone和somebody everybody一样吗
用they还是it代替