half an hour 的主谓一致问题half an hour 作主语时,谓语动词应该用单数还是复数?one hour and a half 呢?

half an hour 的主谓一致问题half an hour 作主语时,谓语动词应该用单数还是复数?one hour and a half 呢? half hour =half an hour half hour half an hour 的意思有和区别? spends half an hour的意思 in half an hour的意思是什么? half an hour的意思是什么 half an hour的意思是什么? for half an hour的另一种说法 a half hour还是half an hour? 是half hour还是half an hour? half an hour or a half hour? half an hour later half an hour造句 Half an hour. They talked for half an hour.请问 for half an hour是talked的状语吗? the class began half an hour ago的同一句 the calss()()()for half an hour . a half hour ,half an hour都是半小时的意思吗?　　　一个半小时是什么? an hour and half还是an hour and a half half an hour or hour中文