Study the phrasal verbs. Lead-in.

The guide: “The Parthenon goes back to the 5th century BC.”

The tourist: “Can I come closer to see it better?” The guide: “Sure, go ahead!”

This ferocious looking dog is going for the boy.

No surprise, the boy goes for cats rather than dogs.

“Kitty was feeling fine only yesterday, but then she suddenly went down with the flu. How come?” Ian asked worriedly.

The sun is going down.

The ship is going down after striking an iceberg.

The prices on cruises could also go down.

More phrasal verbs with GO …

go ahead  authorize or permit sb to do sth:
“Can I …?” “Sure, go ahead”
happen (ab. an event):
The concert will go ahead as planned.
go againstoppose, disagree with sb:
He goes against his party’s ideas.
go alongcontinue doing sth:
I went along with my project.
accept sth:
He refused to go along with the mandate.
do an activity:
Don’t forget this as you go along.
go along with (get on with)be on friendly terms with sb:
Mary is a friendly person who goes along with everybody she knows.
go awayleave a place:
“Go away! I don’t want to see you anymore!” she burst out into tears.
go somewhere for a holiday:
People who work hard need to go away somewhere and relax.
vanish:
“Where’s Peter?” “No idea. He went away just now without saying a word.”
go backreturn somewhere:
Jim isn’t planning to go back to the gym, he’s short of time.
date back to:
The Colosseum goes back almost 2000 years. The Parthenon goes back to the 5th century BC.
start doing an activity again:
They made up their mind to go back to advertising after a gross blunder in management.
go back onbreak a promise, not keep your word:
It’s unkind of you to go back on your promise leaving them in difficulty.
go bypass (ab. time):
As time goes by, I start realising how much I have not done.
go downfall:
The prices on food have all gone down!
sink:
The ship hit an iceberg and went down in the twinkling of an eye.
set (about the sun):
The sun goes down in the west.
go down withbecome ill, catch a disease:
Martha is off school, she has gone down with measles.
go for(=go at sb) attack:
He goes for little cute dogs, but this one looks aggressive – I think it’ll go for me at any moment.
choose sth:
I think I’ll go for a salad, I’m not really hungry. 
try to reach your goal:
You have been longing for it all your life, go for it, Tom!
like or be attracted:
Hank goes for blonde blue-eyed girls.
go in forpractise sth as a hobby, participate in a contest:
Her son goes in for sports – tennis, karate and snowboarding.

Practice