Let me give some examples of the phrases I listed above (in the content):

(Please/Do) Go on. = (Please/Do) Continue. = Keep on (doing). = Do more.
They go in ... = They enter...
She goes into a room. = She enters a room.
He goes into everything. = He tries (to do) many many things.
We can go up. = We can rise to a higher/better level.
It went down. = It lost its position = It got worse. = It sank (into a sea/a hole/...).
I go after [something/someone]. = I want to catch (up with) [something/someone].
He is going out with [someone]. = He is dating [someone]. = He has a girlfriend.
The fire went out. = The fire died out. The fire stopped burning.
[What/Who] goes before [something/someone] : 4 goes before 5. : John goes before Mary.
I will go over it again. = I will do it again. = I will reconsider.
The boat went under. = The boat sank.
He went under. = He was poor/broke. = He lost money.

"going, going, gone" : a common way to urge a decision. ; "Do it now before it ends."

As we can see English is Plain and Simple or not as difficult as we think it is.