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?| Subject | Auxiliary | (not) | |
|---|---|---|---|
| I / We / You / They | have | (not) been | to the Czech Republic. |
| He / She / It | has |
| Q. word | Auxiliary | Subject | Verb |
|---|---|---|---|
| Where | have | I / you / we / they | been? |
| has | she / he / it |
| Question | Short answers |
|---|---|
| Have you been to Russia? | Yes, I have. / No, I haven't. |
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 MondayWe use ever in questions.
Have you ever been to Russia?We use never in negative sentences.
I've never been to Russia.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).