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gray sth
gray 作及物动词，表示“使……变成灰色”；常用于自然力量或时间造成的变化。
The rain grayed the old wooden fence.
雨水把旧木栅栏变成了灰色。
变成灰色
grays — third person singular of gray
先理解核心含义，再看它在真实句子里的用法。
变成灰色
turn grey
The rain grayed the old wooden fence.
雨水把旧木栅栏变成了灰色。
不及物动词，表示自身变为灰色。
使变灰；使成灰色
make grey
变灰
turn grey
gray
Base
原形
grays
3rd person
第三人称单数
graying
-ing
现在分词
grayed
Past
过去式
grayed
Past participle
过去分词
His hair grays quickly.
他的头发很快变灰。
The years grayed his beard.
岁月使他的胡须变灰。
Her hair has grayed over time.
随着时间推移，她的头发已经变白了。
gray 作动词表示（使）变灰，尤指头发变白；美式拼写 gray，英式拼写 grey。
The sky grayed as the storm clouds moved in.
随着乌云逼近，天空变成了灰色。
His hair has grayed a little since we last met.
自从我们上次见面以来，他的头发已经有点变白了。
The artist grayed the background to make the flowers stand out.
艺术家把背景涂成灰色，好让花朵更显眼。
gray 作及物动词，表示“使……变成灰色”；常用于自然力量或时间造成的变化。
The rain grayed the old wooden fence.
雨水把旧木栅栏变成了灰色。
gray 作不及物动词，表示“变成灰色”；主语是本身变灰的事物。
The sky often grays before a storm.
暴风雨来临前，天空常常变成灰色。
进行时 be graying 强调逐渐变灰、变白的过程，常指头发或人的外貌变化。
Her hair is graying.
她的头发正在变白。
Not this
His hair has gray since he was young.
Use this
His hair has grayed since he was young.
现在完成时 has 后须接过去分词；gray 作动词意为“变灰”，其过去分词是 grayed，不能用形容词 gray 代替。
Not this
His hair gray quickly with age.
Use this
His hair grays quickly with age.
主语 his hair 是第三人称单数，一般现在时动词要加 -s；汉语没有这一变化，因此容易漏掉。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
两鬓变灰
He was graying at the temples.
他的两鬓渐渐变白了。
过早变灰
Her hair grayed prematurely.
她的头发过早变白了。
随年龄增长而变灰
His beard grayed with age.
他的胡须随年龄增长而变白了。
花白的头发
His graying hair made him look older.
他花白的头发让他显得更老。
（因眩晕或缺氧）眼前发黑、失去知觉；使（控件）变灰无效
When I stood up too quickly, everything grayed out and I nearly fainted.
我猛然站起来时，眼前一片发黑，差点晕倒。
……的人口老龄化（比喻群体逐渐变老）
The graying of the population is placing a heavy burden on pension systems.
人口老龄化给养老金体系带来了沉重负担。
发长 /eɪ/ 音 (如 day, play)
Use grays naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把gray联想成grey的美式拼写，想象黑发渐成灰白，动词gray就是“变灰、使变灰”。
语域：neutral 常见场景：describing hair turning gray、describing materials or colors becoming gray gray 作动词时通常描述头发变白或颜色逐渐变灰，多用于日常口语和一般书面语，没有明显的正式或非正式倾向，属于中性表达。
这些词都与 gray 的韵脚 /eɪ/ 完全匹配：day、way、say、play、stay、pray 都押韵。注意不要被拼写误导：gravy /ˈɡreɪvi/、grass /ɡræs/、grayish /ˈɡreɪɪʃ/ 虽然以 gra 开头，但发音与 gray 并不完全押韵。
Dictionary facts from ECDICT, WIKTIONARY.