I almost had an accident.

Almost + past tense: ~할뻔했다.

 

- Honestly, I almost won the lottery yesterday.

- I almost forgot to tell you ( 말하는걸 깜빡 할뻔 했다.)

- She was on diet but, she almost had a great dinner on weekdays. 

 

Last Friday, I met one of my best friends from my hometown.

be + almost + state

- I'm almost done. (나 거의 다 끝났어)

- Are you done cleaning your room? / Yes, I'm almost finished.

- We're almost ready.

- I'm almost there.

 

My parents were almost finished preparing to leave this country.

 

Could have + p.p  : 어떻게 될 수도 있었다 / 어떻게 할 수도 있었다.

- You shouldn't leave your phone on the table like this.  Someone could've stolen it.

 

I don't know why but, it's fine leaving without your stuff at a cafe. However, you shouldn't leave like that abroad. 

You could've lost yours if you were in my country.