at one time 中文意思、发音与例句

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常用于否定句表示不能同时做两件事。

You cannot work and study at one time.

你不能同时工作和学习。

置于句首，表示过去某个时期。

At one time, I believed everything he said.

曾经，我相信他说的每一句话。

grammarmedium

Not this

He was a teacher at one time of his life.

Use this

He was a teacher at one time in his life.

错误地用介词 'of' 表示时间所属，正确应用 'in' 表示 '在...时期'。'at one time' 本身已包含时间概念，但如需限定范围，用 'in' 搭配时间段。

grammarmedium

Not this

I can only eat two pieces of cake at one time.

Use this

I can only eat two pieces of cake at a time.

混淆了 'at one time'（曾经/同时）与 'at a time'（每次）。表示 '每次' 时应用 'at a time'。