I often find myself using the grammatical expression for this week: “like there’s no tomorrow”. It is used when we want to say someone does something very intensely. For example:
My friend always drinks like there’s no tomorrow. I’m really worried about her.
You shouldn’t spend money like there’s no tomorrow. You have to think about the future!
Jill must have been so hungry last night at the party. She was eating like there was no tomorrow.
Did you see Fred in the race? He was running like there was no tomorrow. I’ve never seen him run so fast before.
So the idea with this expression is that the person does this thing so intensely as if they were going to die the next day and that would be their last chance to do it.
As you can see, it’s possible to use “was” in the expression if you’re using it to talk about a past situation. My last two sentences are examples of that.