half的用法有几种

half的用法有几种 half副词的用法 in half ,at half,by half的区别和用法 half 的用法一条条列, half的用法是 one and a half years 还是one and a half year?half具体的用法? half的用法是怎么样的啊 half的用法（比如一个半小时） half a sandwich,half hour,one and a half hour.这些half的用法都不相同,该怎么理解?half hour正确吗，应该用half an hour? A.one and a half year`sB.a year and a half`sC.one and a half yearD.a year and a half的区别和用法A.one and a half year`sB.a year and a half`sC.one and a half yearD.a year and a half 问一个简单的英语用法.I bought a pair of shoes_____a.at the half priceb.at half the price这应该是属于一个用法问题 ·· half half 的中文意思 关于half of 的用法.half of +可数名词单数,谓语动词用单数还是复数?half +可数名词复数,谓语动词用单数还是复数?half of +不可数名词,谓语动词用单数还是复数? as as 的用法It is ---- it is long.A.half not as wide as B.wide not as half as C.not half as wide as D.as wide as not half Not until half an hour later.You must come home with me now.until 的用法 I have achieved only half of what I hope to do.what的用法,是什么从句 half的用法.他最后的航行was more than half a century earlier（早半个多世纪） than哥伦布发现美洲大陆.一个半小时是an hour and a half /one and a half hours那么【half a century 】可不可以用【a half century】?这 I fell asleep half way through movie 的意思请把句子翻译一下并解释 through ,half way 在文中的意思和用法 one hour and a half是错的吗?老师说只能用an hour and a half,如果不行,是语法规定的还是习惯用法?