half an hour 是单数还是复数
half an hour 是单数还是复数
one and a half hour看做单数还是复数?half an hour
是half hour还是half an hour?
an hour and a half 做主语时,谓语用复数还是单数
half 是单数还是复数
half是单数还是复数
one hour and a half 后面是复数谓语还是单数谓语
one hour and a half作主语谓语是单数还是复数?one and a half hours呢?
a half hour还是half an hour?
one hour and a half 的谓语是单数还是复数,one and a half hours 的谓语是单数还是
half the books是单数还是复数
half zhe class是单数还是复数?