You’re leaving home with your partner. It looks like it’s going to rain. Use one of the phrases: on impulse, on the flip side, on the safe side

A friend has asked about your holidays by the beach. Use one of the phrases: on impulse, on the flip side, on the safe side

Your partner bought an expensive TV without consulting you. You’re angry. Use one of the phrases: on impulse, on the flip side, on the safe side

You accidently spilled coffee on a friend’s laptop. It’s not working now but your friend says you don’t need to worry about it. Use one of the phrases: on [someone’s] part, on [someone], on the off chance

You and your partner have found a packet of cigarettes in your teenage daughter’s bag. Use one of the phrases: on [someone’s] part, on the sly, on the fence

You are late to a date because you had to take a bus, which you hadn’t planned. Use one of the phrases: on [someone], on the bright side, on the fence

You and your boss are waiting for a colleague in a restaurant. You had agreed to have lunch together. You’ve tried calling the colleague’s phone but it’s off. Use one of the phrases: on [someone’s] part, on the sly, on the off chance

A friend can’t decide if they want to go to a concert or not. You want to go with her. Use one of the phrases: on [someone], on the bright side, on the fence

You thought you would be promoted because you have been putting a lot of effort into a new project at work. Instead, someone else was promoted. A friend now asks you about the situation at work. Use one of the phrases: on [someone’s] part,