I've been watching this brilliant film for two hours. it's my cup of tea.
I've recently gone to the theatre and I liked the play, it's my cup of tea.

I've been typing this report since morning. it's not a piece of cake.
I've passed this test easily. it's a piece of cake!

Tom has just promised not to spill the beans about my plans to get married.
Bill has been already talking about his plans for an hour and I promised not to spill the beans

You have to take everything she says with a pinch of salt, because she has recently told a lie.
Tom has been always lying since his childhood so you shouldn't take everything with a pinch of salt.

you've broke this vase, it's no use crying over spilt milk.
he has been braking everything all the morning, it's no use crying over spilt milk