Would you be kind enough to tell me whether I am right with my interpretation of the expressions in bold in the following sentences?
Six months after the country's controversial presidential election, protests in Iran have yet to let up.
It's raining as hard as ever. It's not letting up at all.
When will this rain let up?
It snowed for three days before it let up and we could go outdoors.
let up = to become less, weaker, or quiet; become slower or stop; cease, stop entirely
Grandfather has been working all his life. When is he going to let up?
Let up for a minute. You can't work hard all day.
The doctor has been working for fifty hours without letting up.
Jim ran all the way home without letting up once.
let up = to do less or go slower or stop; relax; stop working or working hard
Why don't you let up on the child?
Let up on Jane. She is sick.
let up on = be or become more lenient with, take the pressure off
John pitched a ball that was very fast and the batter missed it. Then he let up on the next pitch and the batter was badly fooled.
let up on = to pitch a ball at less than full speed in baseball
The road was slippery, so Mr. Jones slowed down the car.
Pat once could run a mile in five minutes, but now that he's older he's slowing down.
The severe snowstorm has slowed the traffic down.
The doctor advised Jim to slow down for a time, to give his heart a chance.
slow down = to go more slowly than usual
The factory has had to slow down production.
You really ought to slow down - all these late nights are not doing you any good.
Thank you for your efforts.
You're right in every case. Good job. You could be teaching English phrasal verbs.