about to (do something):
— I was about to raise my hand in class when Sally shouted out the answer.
— I thought my boyfriend was about to propose marriage but he broke-up with me instead.
— What took you so long to get here? I was about to leave.
— I'm about to put dinner on the table so go wash your hands.
— Sssshhh! The speaker is about to start his lecture.
— We were about to buy a new car when our neighbor told us he was trying to sell his two-year-old Mercedes.
— The plane it's about to land so please put your seat in the upright position and close your tray table.
— Don't say another word! I'm about to lose my patience with you.
— The toy store announce it's about to close 40% of its stores to avoid bankruptcy.
— I was just about to cheat on my diet but luckily my sister called and talked me out of it.
More idioms will be added in the future so check back frequently or sign-up for my free newsletter to learn about new updates to my website.