I'm furious because I bought this computer. It's awful and I hate it.
I shouldn't have bought this computer.
I didn't study enough and failed the test.
I should have studied more.
I don't have my sweater and now I'm cold.
I should have brought my sweater.
I didn't call my grandma on her birthday and now she's mad at me.
I should have called my grandma.
I didn't charge my phone before going to bed and now it's dead.
I should have charged my phone
I forgot to do my homework and now it's late.
I should have done my homework.
I lied to my parents, they found out and now I'm grounded.
I shouldn't have lied to my parents.
I didn't think of that, but now it's too late.
I should have thought of that.
I didn't bring my umbrella, and now it's raining.
I should have brought my umbrella.
I ate too much and now I feel sick.
I shouldn't have eaten so much.