You must be convinced that such a state of things cannot last long.

There was no saying how long this state of the atmosphere might last.

However, it was impossible that this state of things could last.

A general state of war lasted for 10 days and ended on 6 July 1991.

But this state of affairs only lasted a few years.

But this state of things will not last for ever.

This state of affairs would not last more than a few months.

This happy state only lasted a day or two, however, before things took a turn for the worse.

I didn't much care for being in it myself, but hopefully that state wouldn't last very long.

This state may last from a few months to more than 10 years.