She had been cleaning the office, so we had to wait outside.

她已经打扫过办公室了，所以很整洁。(强调结果)。

youdao

She had been cleaning the office, so we had to wait outside.

她一直在打扫办公室，所以我们不得不在外面等着。

youdao

There must be someone present when cleaning the office; otherwise it is not allowed to do any cleaning work.

必须在办公室内有人时才可做清洁；否则清洁工作是不被允许的。

youdao

The film won 11 out of its 14 nominations, matching Ben Hur and also cleaning up at the box office.

BBC: NEWS | Entertainment | Oscars 2003

Nichols also said the cleaning of the four offices in the Longworth House Office Building are complete and will be "fully functional" next week.

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He was flabbergasted when at the appointed time, the lady who had been cleaning his office walked in.

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