Still/ yet/ already/ just

already

They´ve already bought their Christmas presents.

She´s already seen that film.

just

He´s just had his breakfast.

I´ve just sent an e-mail to Mary.

yet

he hasn´t had lunch yet.

Have you finished yet?

* already y just se utilizan detrás de have ( has y delante del past participle. John has already finished the exam. She´s just left the house.

* yet se coloca al final de las frases. Se utiliza en oraciones negativas e interrogativas. Have you seen Harry Potter yet? I haven´t read the book yet.