You must not forget that you have responsibilities.

你不能忘记你的责任。

youdao

We must not forget the disadvantages of these services.

我们不能忘了这些服务的缺点。

youdao

One must not forget his origin, now that he is appointed to the leading post.

当了领导干部可不能忘本。

《新英汉大辞典》

But he said the nation must not forget the near-collapse of the banking system in two thousand eight without fixing its causes.

VOA: special.2010.04.16

It is a day of meditation for the whole country. (Recording) Sow says people must not forget women who were arbitrarily killed just because they do not share the opinion of Guinea's ruling military council.

VOA: standard.2009.10.28

We must not forget either the input that coach Tony Smith has had since his arrival.

BBC: Smith's arrival seemed to give Leeds more self-belief

But you must not forget that gold is still precious to two billion Chinese and Indians.

CNN: Money & Investing

"But we must not forget that there are many successful ceramics companies in the city, " he said.

BBC: Wedgwood demise a 'severe blow'