Still, yet & already

a) Still

We use "still" for something going on longer than expected. The situation has not stopped.

It is five o'clock in the morning and Paul is still working

Do you still want to go on holiday?

1.- If the verb has one part (e.g. says, does, fell, etc.), the adverb "still" usually goes before the verb.

I still watch 'Neighbours'

They still go to school

2.- If the verb has two or more parts (e.g. am running, were watching, etc.) the adverb "still" goes after the first verb.

I am still eating my dinner

We are still going to the cinema tonight

3.-If the sentence is negative, "still" goes before the negative.

I gave up smoking, but my friends still haven't given up

4.- If you want to express surprise, "still" can go after the negative.

You don't still like him, do you?

b) Yet

We use "yet" to express "until now".

We use "yet" for something that is expected.

Have you replied to the letter yet?

1.- We normally use "yet" with the present perfect.

I haven't eaten my breakfast yet

Have you been to London yet?

2.- "Yet" goes at the end of a question or a negative statement.

I haven't washed my car yet

Have you seen your Mum yet?

3.- We can use "yet" in the middle of a sentence, this is a little formal.

We have not yet reached a decision on the subject

c) Already

We use "already" for something happening sooner than expected.

I already know how to speak French

1.- If the verb has one part, "already" goes before the verb.

She already knows how to cook

2.- If the verb has two parts, "already" goes after the first verb.

I have already received my exam results

3.- "Already" at the end of a sentence has more emphasis.

Have you typed the letter already? (I am surprised that you have done it so quickly)

4.- You cannot use "already" with a negative sentence.