These adverbs give additional information about when something happens.

Ago

Ago means that something happened in the past. For example:
- I started work three years ago.
- I moved to the States a month ago.

Already

Already is used to say that something happened sooner than expected. For example:
- He is only a child, but he already commits crimes.
- Don't forget to mail the letter. It's already mailed.
- Close the door. I've already done it.

Anymore

We use anymore when something has changed from what used to be. For example:
- I don't work there anymore. (I worked there before, but not now)
- I used to swim 5 times aday, but I don't anymore.
- I don't want to work here anymore.

Just

Just is used for something that happened a short time ago. For example:
- I just finished my homework.
- Why are you bleeding? - I just cut my hand.

We can say Just about when something is going to happen very soon.
- Is dinner ready? - Yes, I'm just about to finish it.
- I'm sleepy. - I'm just about to turn the TV off.

still

still is used to say that an action or a situation is continuing or that it lasted more than expected. For example:
- Did you find a job? No, I'm still looking.
- It is 2 am and she is still working .
- Do you still want to go to the party?

Yet

Yet is used when something hasn't happened. It is used in negative sentences and questions. For example:
- Are you done? No, I'm not done yet.
- Has Ahmad phoned yet? No, not yet.

Still can be used with a similar meaning. For example:
- I haven't finished yet.
- I still haven't finished.
When we use still in negative sentences and questions, we show that we are impatient or that we expect the opposite.
Yet is usually at the end of the sentence, wheras still comes before the negative form.