After the earthquake the bridge was unstable, it could collapse at any moment.
As soon as I get home, I will collapse into bed.
The sneeze caused his house of cards to collapse.
The economic collapse was not easy to recover from.
If you do not get off of the table, it will collapse!
collapse is good
the roof collapsed
Mine shafts are often weak and can collapse. After working for 48 hours without a break, he was about to collapse.
Jane Doe predicted the collapse of the currency.
The Greek economy is teetering on the brink of collapse.
The balanced structure was so unstable that it could collapse at any moment.
The building looks like it is about to collapse.I collapse to the floor when I realise we have run out of tea.The great collapse was a terrible event.
I was reluctant to enter the dilapidated hut for fear that the ceiling would collapse on me.
I'm going to collapse onto the floor.
The decrepit shake, worn from years of weathering, looked as if it could collapse at any minute.
The mood of the verb "was about to collapse" in this sentence is indicative mood, as it states a fact or reality about the old shack.