1
verb + singly
singly 常放在动词后，表示“每次一个”。
The guests arrived singly.
客人们一个一个地到达。
一个一个地；逐一地；各自地
先理解核心含义，再看它在真实句子里的用法。
一个一个地；逐一地；各自地
one by one; one at a time
The guests arrived singly.
客人们一个一个地到达。
单独地；无伴地。
In a single or unaccompanied manner; without a companion.
单独地；特别地；分别地。
Individually; particularly; severally.
独自地,无伙伴地。
Without partners, companions, or associates; single-handed.
真诚地；诚恳地；简朴地。
Honestly; sincerely; simply.
The teacher called the students singly to the front of the room.
老师一个一个地把学生叫到教室前面。
Please review the documents singly before you sign them.
请你在签字前一份一份地审查这些文件。
The flowers were placed singly along the edge of the path.
这些花被一朵一朵地摆放在小径边缘。
singly 常放在动词后，表示“每次一个”。
The guests arrived singly.
客人们一个一个地到达。
置于句首时，强调在单独或孤立的情况下。
Singly, these issues are easy to solve.
单独来看，这些问题很容易解决。
常用于被动语态，表示“逐个地”。
The tablets should be taken singly.
这些药片应该一次服一片。
Not this
The teacher asked the students to answer single.
Use this
The teacher asked the students to answer singly.
这里需要副词 singly（一个一个地）修饰动词 answer，表示方式；single 是形容词，不能作状语，所以应把 single 改成 singly。
Not this
She is the singly most qualified candidate.
Use this
She is the single most qualified candidate.
在 the single most + 形容词这一固定搭配中，single 是形容词，用来强调最高级（“最…的一个”）；singly 是副词，意为“一个一个地”，不能用于这个结构。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
单独出现；单个出现
The flowers may occur singly or in small clusters.
这些花可能单独出现，也可能成小簇出现。
单独出现；逐一出现
In the wild, these birds usually appear singly rather than in flocks.
在野外，这些鸟通常单独出现，而不是成群出现。
逐一考虑；分别对待
The arguments should be taken singly before comparing them.
应先逐一分析这些论点，然后再进行比较。
单独列出；逐项列出
Each symptom is listed singly in the report.
报告中每项症状都单独列出。
单个地或成组地
The exercises can be done singly or in groups.
这些练习可以单独做，也可以分组做。
Use singly naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 single（单个），singly 就是“一个一个地”，像每次只拿一颗豆子。
语域：formal 常见场景：academic writing、formal reports、technical manuals singly 比口语更正式，通常用于书面语或技术、学术说明中；日常交流常说 one by one。
与 singly /ˈsɪŋɡli/ 押韵的有 tingly /ˈtɪŋɡli/、jingly /ˈdʒɪŋɡli/（韵尾均为 /ɪŋɡli/）。注意 lookalike：strongly /ˈstrɔːŋli/ 拼写以 -ngly 结尾但读 /ŋli/ 无 /ɡ/；single /ˈsɪŋɡəl/ 不以 /li/ 结尾；singer /ˈsɪŋər/ 无 /ɡ/；singe /sɪndʒ/ 读法完全不同。
Dictionary facts from ECDICT, WIKTIONARY.