half与half of的区别

half与half of的区别 a half 与half of 的区别? half the class 与half of the class的区别 a half与half a的区别 in half ,at half,by half的区别和用法 half与half of,什么时候用half,什么时候用half of? half dead与dying区别 half of+指代复数名词的which与half of them谓语单复数为何不同? half hour =half an hour half hour half an hour 的意思有和区别? half students和half of the students有什么区别 half the sky half of the sky区别 half an hour 与 one half hour区别 half past hour和half to hour的区别 half Half half half of class与half the class哪个对?如果后者是对的,为什么不用加of?我在有的地方看到“half the class” half half 的中文意思