Oh, we never know how long these things will last.

The whole thing lasted only a minute or so, though it seemed much longer.

You just never know how long a good thing will last.

The whole thing couldn't have lasted more than two seconds.

Those things will probably last more in my memory than if I was to go back this year.

So small a thing, and it would not last for long.

The whole thing couldn't have lasted for more than a minute.

In fact the whole thing had lasted less than two minutes.

They don't make those things to last more than a year.

The thing lasted for no more than a few seconds.