the number of 后面跟has还是have?

the number of 后面跟has还是have? the number of a number of后面跟单数还是复数 a number of /the number of 等等这类词的后面跟第三人称单数还是复数 our class后面跟has还是have 第三人称should后面跟has还是have a numberof ,the number of的区别,他们后面BE动词跟单数还是复数? the number of 和 a number of 的区别是什么,那个后面跟单数 Does your sister usually 后面跟have还是has Does your sister usually后面跟have还是has He和She后面跟have还是has? the number of 后面的名词用复数还是单数 number of 和the number of的区别?还有它们后面谁跟单数谓语,谁跟复数谓语呀?