Elementary Unit 12
Elementary · Grammar Reference
Unit 12 — Present Perfect
Present Perfect · PS vs PP · ever/never/yet/just/already
12.1   Present Perfect

1 The Present Perfect is formed with have/has + past participle.

2 The Present Perfect refers to an action or experience that happened at some time before now.

She's travelled to most parts of the world.Have you ever been in a car accident?
Positive and negative
SubjectAuxiliary(not)
I / We / You / Theyhave(not) beento the Czech Republic.
He / She / Ithas
📌 Note
I've been = I have been · We've been = We have been
They've been = They have been
Question
Q. wordAuxiliarySubjectVerb
WherehaveI / you / we / theybeen?
hasshe / he / it
Yes / No questions and short answers
QuestionShort answers
Have you been to Russia?Yes, I have. / No, I haven't.
been and gone
She's gone to Portugal. (= she's there now)She's been to Portugal. (= now she has returned)
12.2   Past Simple and Present Perfect

1 If we want to say when an action happened, we use the Past Simple not the Present Perfect.

She went to Russia two years ago.I was in a crash when I was 10.

2 Notice the time expressions used with the Past Simple.

last night / yesterday / in 1990 / at three o'clock / on Monday
12.3   Indefinite time
ever and never

We use ever in questions.

Have you ever been to Russia?

We use never in negative sentences.

I've never been to Russia.
yet, just and already

We use yet in negative sentences and questions.

Have you done your homework yet?I haven't done it yet (but I'm going to).

We use just in positive sentences.

I have just done it (a short time before now).

We use already in positive sentences.

I have already done it (before now).