1
fan out
不及物用法，表示人员或物体向不同方向散开。
The crowd fanned out.
人群散开了。
呈扇形散开；成扇形展开
fans out — third person singular of fan out
先理解核心含义，再看它在真实句子里的用法。
呈扇形散开；成扇形展开
to spread out into the shape of a fan
The crowd fanned out.
人群散开了。
展开成扇形
To spread out into the shape of a fan.
fan out
Base
原形
fans out
3rd person
第三人称单数
fanning out
-ing
现在分词
fanned out
Past
过去式
fanned out
Past participle
过去分词
The search party fans out across the field.
搜索队分散到田野各处。
The troops are fanning out along the border.
部队正沿着边境展开。
The team has fanned out to cover more ground.
团队已经分散开以覆盖更大区域。
规则动词短语；变位时只变化动词部分，保留介词 out。
The search party began to fan out across the forest to look for the lost hiker.
搜索队开始分散到森林各处寻找失踪的徒步者。
The police ordered the crowd to fan out and search the area.
警察命令人群散开，搜索该区域。
When the team arrives, they will fan out to cover more ground.
团队到达后，他们将分散开来，覆盖更多区域。
不及物用法，表示人员或物体向不同方向散开。
The crowd fanned out.
人群散开了。
及物用法，名词可置于fan和out之间，表示将某物扇形展开。
He fanned the documents out on his desk.
他把文件扇形展开在桌子上。
常与across, through, into等介词连用，表示散开的具体方向或范围。
The rescuers fanned out across the mountain.
救援人员分散到山上。
Not this
He fanned the cards on the table.
Use this
He fanned out the cards on the table.
当表示'使分散、展开'时，必须使用短语动词 'fan out'。只用 'fan' 通常表示'扇风'，意思完全不同。
Not this
The soldiers fanned out the field.
Use this
The soldiers fanned out across the field.
'Fan out' 描述人员或物体分散时是不及物动词，不能直接接地点名词。需使用介词（如 across、over）引导地点。
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Dictionary facts from ECDICT, WIKTIONARY.