Happen unexpectedly.
Come up.
I've got to go - something has just come up at home and I'm needed there.
Fall in love with somebody.
Fall for
She always falls for older men.
Imply.
Get at
What are you getting at?
Stop trying.
Give up
You'll never guess the answer - do you give up?
Lose control of one's emotions (with "Break").
Break down
Sometimes I feel I'm going to break down and cry.
1. Pay a visit to someone's house.
Come over
Ron came over for dinner the other night.
Quarrel with somebody and stop being friends (2 prepositions).
Fall out with
She'd fallen out with her boyfriend over his ex-girlfriend.
Start working seriously. (2 prepositions)
Get down to
It's time we got down to some real work.
Produce a particular smell, sound etc.
Give off
The gardenia gives off a strong fragrance.
When something unpleasant like a war or disease begins (with "Break").
Break out
Fighting has broken out all over the city.
Regain consciousness.
Come to/(a)round
Has he come to yet?
To fail to do something fast enough or on time.
Fall behind
He was ill for six weeks and fell behind with his schoolwork.
Have enough of something to deal with a situation.
Get by
We can get by with four computers at the moment.
Betray, reveal.
Give away
I'll tell you if you promise not to give it away.
Become popular (with "Catch").
Catch on
I wonder if the game will ever catch on with young people?
Think of an idea, solution... (2 prepositions)
Come up with
We'll think about a present for her and see what we can come up with.
To use in an emergency or as a last resort (2 prepositions).
Fall back on
When the business failed, we had to fall back on our savings.
Manage to make someone understand something.
Get (sth) across
We tried to get our point across, but he just wouldn't listen.
Become exhausted.
Give out
The battery gave out.
Confirm the truth (with "Bear").
Bear out
His version of events just isn't borne out by the facts.
To find by chance
Come across
I came across an old friend onm the street!
Fail to happen.
Fall through
We found a buyer for our house, but then the sale fell through.
Approach a certain age, time etc...
Get on for
She must be getting on for seventy.
Surrender.
Give in
She wouldn't give in until she received a full apology.
Food goes bad (with "Go").
Go off
This bacon smells a bit funny - do you think it's gone off?