1
a/the taillight
taillight 是可数名词，表示单个尾灯时用单数，并需加限定词。
A taillight is required on every motor vehicle.
每辆机动车都必须有尾灯。
尾灯
先理解核心含义，再看它在真实句子里的用法。
尾灯
taillight
A taillight is required on every motor vehicle.
每辆机动车都必须有尾灯。
安装在车辆后部的一对红灯之一,以便夜间从后方可见。
One of a pair of red lights mounted on the rear of a vehicle, so it can be seen from the rear at night.
安装在机动车后部的灯(通常为红色)
lamp (usually red) mounted at the rear of a motor vehicle
I need to replace the taillight on my car because it stopped working.
我需要更换车上的尾灯，因为它不亮了。
The taillights of the truck glowed red as it drove away in the rain.
卡车开走时，它的尾灯在雨中发出红光。
Please check whether your taillight is broken before you drive at night.
夜间开车前，请检查你的尾灯是否坏了。
taillight 是可数名词，表示单个尾灯时用单数，并需加限定词。
A taillight is required on every motor vehicle.
每辆机动车都必须有尾灯。
车辆通常有两个尾灯，因此复数形式 taillights 很常用。
Check both taillights before driving at night.
夜间开车前检查两个尾灯。
也可用所有格表达同一关系，如 the truck's taillight；of 结构更正式。
The taillight of the old truck needs replacing.
旧卡车的尾灯需要更换。
Not this
There are two taillight on the car.
Use this
There are two taillights on the car.
taillight 是可数名词，two 后须接复数形式 taillights；中文名词没有复数变化，所以容易漏掉 -s。
Not this
He bought new taillight for his car.
Use this
He bought a new taillight for his car.
taillight 是可数名词单数，不能单独使用，需要加不定冠词 a 表示“一个”；中文没有冠词，所以学习者容易漏掉 a。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
左侧尾灯
Your left taillight is flashing on and off.
你的左侧尾灯一闪一闪的。
尾灯灯泡
The taillight bulb burned out.
尾灯灯泡烧坏了。
尾灯总成
The car's right taillight assembly was damaged in the crash.
汽车右侧的尾灯总成在事故中受损。
有一个尾灯不亮
She didn't know she had a taillight out.
她不知道自己有一个尾灯不亮。
更换尾灯
It took him twenty minutes to replace the taillight.
他花了二十分钟更换尾灯。
尾灯保修（指车辆一离开经销商处便失效的保修）
The car came with a taillight warranty, so once I drove off the lot I was on my own.
这辆车带的是尾灯保修，所以我一旦开出售车场就得靠自己了。
远远落后于某人，只能看到某人的尾灯
If you don't pick up the pace, you'll be seeing her taillights for the whole race.
如果你不加快速度，整场比赛你就只能看着她的尾灯远远落后了。
Use taillight naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
tail（尾巴）+ light（灯），车尾的红色尾灯，像尾巴上的一盏灯。
语域：neutral 常见场景：car maintenance、traffic safety、vehicle description taillight 是中性常用词，通常用于日常交谈以及车辆维修、驾驶安全等场景，口语和书面语中都比较常见。
All six words have the same final spelling 'ight' and the same final vowel-consonant sound /aɪt/, matching the '-light' part of 'taillight'. Beware lookalikes such as 'eight' /eɪt/ and 'weight' /weɪt/: they end in 'ight' but are pronounced with /eɪt/, not /aɪt/.
Dictionary facts from ECDICT, WIKTIONARY.