Level: intermediate
We use perfect aspect to look back from a specific time and talk about things up to that time or about things that are important at that time.
We use the present perfect to look back from the present:
I have always enjoyed working in Italy. [and I still do]
She has left home, so she cannot answer the phone.
We use the past perfect to look back from a time in the past:
It was 2006. I had enjoyed working in Italy for the past five years.
She had left home, so she could not answer the phone.
We use will with the perfect to look back from a time in the future:
By next year I will have worked in Italy for 15 years.
She will have left home by 8.30, so she will not be able to answer the phone.
Present perfect
We use the present perfect:
- for something that started in the past and continues in the present:
They've been married for nearly 50 years.
She has lived in Liverpool all her life.
- when we are talking about our experience up to the present:
I've seen that film before.
I've played the guitar ever since I was a teenager.
He has written three books and he is working on another one.
- for something that happened in the past but is important in the present:
I can't get in the house. I've lost my keys.
Teresa isn't at home. I think she has gone shopping.
We normally use the present perfect continuous to emphasise that something is still continuing in the present:
It's been raining for hours.
I'm tired out. I've been working all day.
Past perfect
We use the past perfect:
- for something that started in the past and continued up to a later time in the past:
When George died, he and Anne had been married for nearly 50 years.
She didn't want to move. She had lived in Liverpool all her life.
- when we are reporting our experience up to a point in the past:
My eighteenth birthday was the worst day I had ever had.
I was pleased to meet George. I hadn't met him before, even though I had met his wife several times.
- for something that happened in the past and is important at a later time in the past:
I couldn't get into the house. I had lost my keys.
Teresa wasn't at home. She had gone shopping.
We use the past perfect continuous to show that something started in the past and continued up to a time in the past or was important at that time in the past:
Everything was wet. It had been raining for hours.
He was a wonderful guitarist. He had been playing ever since he was a teenager.
Modals with the perfect
We use will with the perfect to show that something will be complete at or before some time in the future:
In a few years they will have discovered a cure for the common cold.
I can come out tonight. I'll have finished my homework by then.
We use would with the perfect to refer to something that did not happen in the past:
If you had asked me, I would have helped you.
I would have helped you, but you didn't ask me.
You didn't ask me or I would have helped you.
We use other modals with the perfect when we are looking back from a point in time. The point of time may be in the future:
We'll meet again next week. We might have finished the work by then.
I will phone at six o'clock. He should have got home by then.
or the present:
It's getting late. They should have arrived by now.
He's still not here. He must have missed his train.
or the past:
I wasn't feeling well. I must have eaten something bad.
I checked my mobile phone. She could have left a message.
- Perfect aspect 1
- Perfect aspect 2
- Perfect aspect 3
Hello Hasan 97,
The past perfect describes an event in the past before a later past time event, but it also shows a relationship between thost events in that one event (the earlier event) influences the other. Your sentences have no context and so it's not really possible to say what the relationship between the events might be, and if the past perfect would be appropriate, or if two past simple forms, showing a sequence in the past, would be better.
Peter
The LearnEnglish Team
Hello Unpopular Opinion,
Without any other context that is not a correct sentence. You need a second past time reference (stated in the sentence or implied by the context), which could be a time in the past or an action in the past.
You can read more about the past perfect here:
https://learnenglish.britishcouncil.org/grammar/intermediate-to-upper-intermediate/past-perfect
Peter
The LearnEnglish Team
Hello Plokonyo,
The second one is correct; the first one doesn't make sense.
All the best,
Kirk
The LearnEnglish Team
Hello Plokonyo,
'Next year' speaks about a period of time of one year, but then the phrase 'for five years' speaks about a period of five years. These two time periods are inconsistent for the action 'I will live in'.
You could say something like 'Next year I will move to London for five years' instead, and that would make sense.
All the best,
Kirk
The LearnEnglish Team
Hello Harry de ZHANG,
When we have a time marker which indicates a finished past time period, such as yesterday, last week or 2017, we do not use the present perfect. The correct forms in your first example would be as follows:
Peter
The LearnEnglish Team
Hello Samin,
The correct form is 'Have you been ill?'.
All the best,
Kirk
The LearnEnglish Team
Hello Samin,
While these sentences are suggesting that the listener do something, technically speaking, they are not imperative verb forms.
All the best,
Kirk
The LearnEnglish Team
Hello ER,
You clearly understand these verb forms in general, but there are a few small points that aren't completely correct. First of all, 'since how long' sounds a little strange to me. I'd recommend saying just 'how long', which communicates the idea you want.
Second, in a question like 'How long have you had the flu?' (or the other two questions), it's the verb form (present perfect simple or present perfect continuous) that communicates the idea of a time period beginning in the past that has a connection with the present. (You could use 'how long' to speak only about the past, e.g. 'How long did the First World War last?')
Third, it's not impossible for a stative verb to be used in a continuous form -- it's just unusual. We can still use a continuous form to communicate one of its common meanings, e.g. to describe something changing or developing: 'I'm loving the new TV series'. In this example, the TV series is still not complete and my use of the continuous could be showing this, or it could be showing that I'm surprised that I'm liking it (it's something new for me to enjoy this kind of programme). But most of the time we'd just say 'I love the new TV series'.
So you are right in thinking that sentence 2 above isn't correct, at least in most situations. It could be correct in a very specific context, but in general we wouldn't use it.
Sentences 1 and 3 are correct.
I hope this helps you understand these finer points.
All the best,
Kirk
The LearnEnglish Team
Hello Samin,
'would have been' is sometimes called the conditional perfect tense. Our grammar doesn't use this term, but you can read more about this form on our 'would' and 'would have', Modals with 'have' and Conditionals 2 pages.
All the best,
Kirk
The LearnEnglish Team
Hello Satinder,
Whether the past simple or the past perfect is better will depend upon the context in which the sentences are used. Without knowing the broader context I can only say that both sentences are grammatically possible.
Peter
The LearnEnglish Team
Hello Charneet
In the first pair of sentences, the first one is correct since it refers to a period of time the speaker is still in (the past year). The second is not correct.
In the second pair of sentences, the first one is correct and the second is not. In the second sentence, if you changed 'last year' to 'the year before', then it would be correct.
All the best
Kirk
The LearnEnglish Team
Hello Charneet kaur,
The sentence
I have been working on this project
is perfectly fine. That's not to say that it necessarily makes sense in a given context, but there's nothing grammatically wrong with it. In context, you might need to add how long you've been working on the project, for example, but that's not a grammar issue.
Peter
The LearnEnglish Team
Hello MarcoDeAngeli
When we use a modal with the perfect, the perfect part ('have' + past participle) never changes. This is a very common mistake. I'd suggest you remember that 'could' is really the verb that agrees with the subject. Since 'could' is a modal, it doesn't take the final -s, but if it were a simple present perfect, it would 'She has left a message', where the verb 'have' is the one that agrees with the subject 'she'.
I hope that helps you remember it, but if you find it more confusing, please ignore what I said!
All the best
Kirk
The LearnEnglish Team
Hello Mersi
Although there is a verb 'to marry', it is rarely used. More often we use the adjective 'married' with the verb 'to be' or 'to get'.
The expression used here is 'to be married'. So the verb 'be' is in the past perfect ('had been') and the adjective doesn't change form.
Does that make sense?
All the best
Kirk
The LearnEnglish Team
Hello jessicacopat
The first one is speaking about the present time, or events perceived as connected to the present. The second one is speaking about a past time.
All the best
Kirk
The LearnEnglish Team
Hello Peppy
Both are grammatically correct. 2 is more likely when you begin speaking about this topic, whereas 1 would be more likely after you'd already spoken about various things that were stolen, or to emphasise that nothing at all was left.
All the best
Kirk
The LearnEnglish Team
Hello Dayan,
The first one is correct:. You could also say this:
I haven't seen John for years.
I noticed you posted the same comment twice. There is always a delay between writing a comment and it appearing because all comments are moderated (checked) before they are published so we can get rid of spam advertising. There is no need to post comments multiple times.
Peter
The LearnEnglish Team
Hello redream
The first sentence is correct but the last two are not -- neither 'whole her life' nor 'her life all' are correct.
All the best
Kirk
The LearnEnglish Team
Hello sam61
The first one is correct. When there is subject-verb inversion, only the auxiliary verb (in this case, 'should') moves.
All the best
Kirk
The LearnEnglish Team
Hello manuel24,
'Must have' tells us that the speaker does not know the reason why they feel unwell, and is speculating. We use perfect modal verbs to speculate about the past in this way. If the speaker was sure then the past perfect (I had eaten) could be used, as you say.
You can read more about modal verbs in the appropriate grammar section:
https://learnenglish.britishcouncil.org/english-grammar/modal-verbs
We also have pages about deduction in the present
https://learnenglish.britishcouncil.org/intermediate-grammar/modals-deduction-present
and in the past
https://learnenglish.britishcouncil.org/intermediate-grammar/modals-deduction-past
Peter
The Learn English Team