1. Present perfect
2. Structure of present perfect
- Affirmative form
Subject auxiliarY Verb
Examples I have
been I have been to Mexico. You You have been to Mexico. He has
He has been to Mexico. She She has been to Mexico. It It has been to Mexico. We have
We have been to Mexico. You You have been to Mexico. They They have been to Mexico.Remember that with regular verbs we form the past participle by adding -ed to the end of the verb, while with irregular verbs we have to look at the 3rd column of the list of irregular verbs.
- Negative form
Subject auxiliarY Verb
Examples I have not
been I haven't been to Mexico. You You haven't been to Mexico. He has not
He hasn't been to Mexico. She She hasn't been to Mexico. It It hasn't been to Mexico. We have not
We haven't been to Mexico. You You haven't been to Mexico. They They haven't been to Mexico.
- Interrogative form
auxiliarY Subject Verb
Examples Have I been? Have I been to Mexico? you Have you been to Mexico? Has he Has he been to Mexico? she Has she been to Mexico? it Has it been to Mexico? Have we Have we been to Mexico? you Have you been to Mexico? they Have they been to Mexico?
Interrogative sentences in present perfect also have their own short answers.
3. How is the present perfect used?
The present perfect is used for:
- Actions performed at undetermined point in the past that have a result in the present. It is not important to know exactly when the action occurred.She has made her bed.He has watered the plants.
.She has flown in a balloon, she has done parachuting and she has swum with dolphins.
- Repeated actions that have taken place at different times in the past, that is, that have occurred more than once.I have lost my wallet four times.I have seen the film twice.He visto la película dos veces.
- Actions that began at some specific point in the past and continue in the present.Mary has worked in a bank since 1999.
4. Time expressions with the present perfect
With the present perfect the following time expressions are usually used:
The action took place a short time ago and it's finished. It is mainly used in affirmative sentences and it is placed between the auxiliary verb have and the main verb.Sally has just washed her hair.They have just done an exam.
The action took place at some point before now or before the expected time. It is used in affirmative sentences and it can go between the auxiliary verb have and the main verb, or at the end of a sentence.Mary has already washed the dishes.We have already been here.
In interrogative sentences it is used to ask whether something that was expected to happen has occurred. In negative sentences it is used to express that an action that should have happened has not taken place. It goes at the end of a sentence.My sister hasn't arrived in London yet.Has Mr. Jones corrected the exams yet?
It shows duration, that is, how long an action lasts or continues. The action began at a particular time in the past and continues into the present.We have been married for two years.She has lived in London for 12 years.
It indicates when the action began and covers the period of time between that particular moment in the past and the present.I haven't smoked since last week.She has worked in the company since April.
It means at any time in the past. It is usually used to ask about experiences and it is placed between the subject and the main verb.Have you ever eaten snake meat?Has he ever played volleyball?
- HOW LONG
It is mainly used in interrogative sentences to ask about the period of time that has passed since the action began until the present moment.How long have you been together?How long has Paul taught in this school?
Time expressions that indicate a specific moment in the past, for example: yesterday, on Monday, at 6, last year... are used with the simple past but not with the perfect present unless we refer to a period of time that has not yet ended (this week, today, this year...).
In both examples, the time period expressed (today, this year) has not ended.
|AFFIRMATIVE||Subject + have / has + verb (past participle) + (compl.)||I have ridden a horse many times.|
|NEGATIVE||Subject + have / has + verb (past participle) + (compl.)||We haven't finished our homework.|
|INTERROGATIVE||Have / Has + subject + verb (past participle) + (compl.)?||Have you seen Joe? No, I haven't.|