half的用法
half的用法大全：
    half的用法1：half用作形容词的意思是“一半的”,表示“半个某物”时,英式英语多用; 美式英语多用。
    half的用法2：half也可作“(。点钟)以后半小时”解。
    half的用法3：half可直接修饰名词,但不可直接修饰代词。
    half的用法4：“一个半某物”有两种表达法:a/an+名词单数+and a half(half为名词)或one and a half+名词复数(half为形容词)。例如:A month and a half has passed.一个半月过去了。One and a half pears is left on the table.桌上还留一个半梨子。在上述两种结构作主语时,谓语动词都用单数形式。
    half的用法5：half在表示“一半”的数量时,英式英语一般用half a/an,如half an hour(半小时), half a dozen(半打); 而美式英语一般用a half,如a half hour, a half dozen, a half apple。
但half与数词连用时,冠词须置于half之前。例如:I spent two and a half years there.我在那儿呆了两年半。
half的用法例句：
curtains    1. Elliott crossed the finish line just half a second behind his adversary.
    埃利奥特跨过终点线时仅比对手落后半秒钟。
    2. She'd half expected him to withdraw from the course.
    她多少已经预料到他会中途就退出这门课程。
    3. The French, who led 21-3 at half time, scored eight tries.
    上半场以21：3领先的法国队有8个达阵得分。
    4. The curtains were half drawn to cut out the sunlight.
    窗帘拉上了一半以遮挡阳光。
    5. From what I hear, half the campus is lusting after her.
    从我听到的来看，半个学校的人都想和她上床。
    6. You're not half the man you think you are.
    你根本不是你自己想象的那种人。
    7. It's half past two. I think we had better go home.
    现在两点半了。我想我们最好还是回家吧。
    8. Half of PML's scientists have first degrees, the other half have PhDs.
    普利茅斯海洋研究所的科学家一半有学士学位，另一半则有博士学位。
    9. The five survivors eventually reached safety, ragged, half-starved and exhausted.
    5位幸存者最终到达安全之地时已经衣衫褴褛、饥肠辘辘、精疲力尽。
    10. He spent two and a half weeks with us in June 1986.
    1986年6月他和我们一起呆了两周半。
    11. Add a few drops to half a tumbler of water.
    在半玻璃杯水里面加上几滴。
    12. Too often he only absorbs half the information in the manual.
    他对于说明书上所说的经常是一知半解。
    13. By half distance we held a comfortable two-lap lead.
    到半程时，我们轻松领先两圈。
    14. Every year they panned about a ton and a half of gold.
    每年他们淘出大约1.5吨金子。
    15. Less than a half hour later he returned upstairs.
    不到半个小时，他又跑上楼来。