perfect+tenses


 * TIME EXPRESSIONS FOR PERFECT TENSES.**


 * **EVER /// NEVER**

. - **EVER**.- **Adverb** normally used in **questions**. Ex: //Have you ever been to China?// (¿Has estado alguna vez en China?) It is also used in **affirmative** sentences where there is a **superlative adjective.** Ex: //This// //is the most boring film I've ever seen.// (Esta es la película más aburrida que he visto jamás. /// Jamás he visto una película tan aburrida.)

.- **NEVER**.- Adverb used in **negative** sentences. Ex: //I've never been to China.// (Nunca he estado en China)


 * **JUST /// ALREADY /// YET**

.- **JUST** = **“ a short time ago”**. We describe a very recent event. In Spanish it is translated as: //acabar de hacer algo”//. Ex: “Would you like something to eat?” “No, thanks.I've just had lunch” (“¿Quieres comer algo?” “No gracias. Acabo de comer”) It is //placed// //between// the auxiliary verb Have/has and the Past Participle.

.- **ALREADY** .- In **affirmative** sentences ALREADY is used to express that something has happened before expected **(Ya).** It is //written// //between// HAVE /HAS and the PAST PARTICIPLE. Ex: “What time is Mark leaving?” “He's already gone”. (“¿A qué hora se va Mark?” “Se ha ido ya”)

.- **YET** = **“until now”** (**TODAVÍA; AÚN; YA**). In **negative** sentences and **questions**. YET is used to show the speaker is expecting something to occur. Normally it is //placed// at the //end// of the sentence. Ex: I've written a letter but I haven't posted it yet. ( He escrito una carta pero todavía no la he echado al correo ); Have you posted the letter yet? (¿Has echado ya la carta?)


 * **FOR /// SINCE**

.- **FOR**.- It describes the length of a time **period** (six hours, seven weeks...) Ex: I haven't seen Tom for three days ( No he visto a Tom durante / en tres días)

.- **SINCE**.- It describes the **point** when the time period started (8 o'clock, Monday...) Ex: I haven't seen Tom since Monday. (No he visto a Tom desde el lunes) 20 minutes a week a long time ages (...) || Monday 1972 Christmas lunchtime they were at school (...) ||
 * = for = || = since = ||
 * two hours