a willow
willow 是可数名词，单数形式前通常要加冠词或限定词。
A willow grew beside the river.
河边长着一棵柳树。
柳树；柳属植物
柳木；开棉机；清棉机；各种落叶乔木或灌木,属于柳属,主要生长在北半球较凉爽地区的湿润土壤上。；任何属于柳属的落叶树木和灌木；这些树的木材。
willow
各种落叶乔木或灌木,属于柳属,主要生长在北半球较凉爽地区的湿润土壤上。
Any of various deciduous trees or shrubs in the genus Salix, in the willow family Salicaceae, found primarily on moist soils in cooler zones in the northern hemisphere.
任何属于柳属的落叶树木和灌木
any of numerous deciduous trees and shrubs of the genus Salix
这些树的木材。
The wood of these trees.
一种纺织机器,具有旋转尖刺系统,用于打开和清洁原纺织纤维
a textile machine having a system of revolving spikes for opening and cleaning raw textile fibers
用于打开和清理棉头的旋转带刺鼓。
A rotating spiked drum used to open and clean cotton heads.
The old willow leans over the stream, its branches touching the water.
那棵老柳树斜倚在小溪上，枝条垂到水面。
用法提示：willow 是名词，指柳树。
We spread a blanket under a large willow and had a picnic.
我们在一棵大柳树下铺开毯子野餐。
用法提示：willow 作名词，指柳树，作 under 的宾语。
The willows along the lake turn bright green in early spring.
湖边的柳树在早春变成亮绿色。
用法提示：willows 是 willow 的复数形式，仍指柳树。
willow 是可数名词，单数形式前通常要加冠词或限定词。
A willow grew beside the river.
河边长着一棵柳树。
复数 willows 泛指多棵柳树，句中谓语用复数形式。
Willows lined both banks of the river.
柳树排列在河的两岸。
willow 可作定语直接修饰名词，如 willow tree、willow branch 等常见搭配。
She sat in the shade of a willow tree.
她坐在一棵柳树的树荫下。
用 's 表示柳树的所属关系，多指其枝条、叶子等部分。
The willow's branches swept the surface of the lake.
柳树的枝条拂过湖面。
grammar · medium
易错句子The basket is made of willows.
正确表达The basket is made of willow.
当 willow 指柳木这种材料时，是不可数名词，不能加复数词尾 -s；复数 willows 只表示多棵柳树。表示材料应使用单数形式 willow。
grammar · medium
易错句子There are many willow by the river.
正确表达There are many willows by the river.
willow 表示柳树时是可数名词，前有 many 等修饰语时必须用复数形式 willows。汉语名词无复数变化，容易遗漏 -s。
grammar · medium
易错句子In spring, willows fly in the air.
正确表达In spring, willow catkins fly in the air.
汉语“柳絮”指柳树种子上带的毛，英语应说 willow catkins，不能直接用 willow（柳树）代替，否则句子意思变成“柳树在空中飞”。
垂柳
A weeping willow cast long shadows over the pond.
一棵垂柳在池塘上投下长长的影子。
柳树
Willow trees grow well in moist soil.
柳树在湿润的土壤中长势良好。
柳枝
She placed a willow branch in the vase.
她把一根柳枝插进花瓶里。
柳树皮
Willow bark has been used to relieve pain for centuries.
几个世纪以来，柳树皮一直被用来缓解疼痛。
柳条篮
He carried the fruit in a willow basket.
他用一个柳条篮装着水果。
白柳
The white willow is common along European rivers.
白柳在欧洲的河流沿岸很常见。
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