Ingles

already, still, yet
 

We use still to show that something continues up to a time in the past present or future. It goes in front of the main verb:

The children still enjoyed playinggames.
They are still living next door.
We will still be on holiday.

… or after the present simple or the past simple of be:

Her grandfather is still alive.They were still unhappy.

We use already to show that something has happened sooner than it was expected to happen. Like still, it comes before the main verb:

The car is OK. I’ve already fixed it. 
It wasearly but they were already sleeping.

… or before the present simple or past simple of the verb be:

It was early but we were already tired.
We are already late.

We use yet in anegative or interrogative clause, usually with perfective aspect (especially in British English), to show that something has not happened by a particular time. yet comes at the end of the sentence:

Itwas late, but they hadn’t arrived yet. 
Have you fixed the car yet?
She won’t have sent the email yet.

Just, yet, still, already

These words are often used with the present perfect tensealthough yet, still and already can all be used with other tenses.

Just

‘Just’ is usually used only with the present perfect tense and it means ‘a short time ago’.

• I’ve just seen Susancoming out of the cinema.
• Mike’s just called. Can you ring him back please?
• Have you just taken my pen? Where has it gone?

In the present perfect, ‘just’ comes between the auxiliary verb(‘have’) and the past participle.

Yet

‘Yet’ is used to talk about something which is expected to happen. It means ‘at any time up to now’. It is used in questions and negatives.

• Have youfinished your homework yet? The speaker expects that the homework will be finished.
• I haven’t finished it yet. I’ll do it after dinner.

‘Yet’ usually comes at the end of the sentence....