Explanation
Exercises
Perfect Continuous & Aspect Choice

Lesson focus

Duration, repetition, temporary activity, visible results and the contrast between perfect simple and perfect continuous

Advanced aim: Choose perfect simple or continuous according to achieved result, duration, repetition, temporariness and lexical aspect; several contexts allow both with a change of focus.

Duration up to now

Use the present perfect continuous to emphasise how long an activity has been continuing.

  • Example: We have been reviewing the contract for nearly three hours.
  • In another context: We have been reviewing the lease for nearly four hours.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Visible recent activity

Use the perfect continuous when recent activity explains a present result or visible evidence.

  • Example: You've been painting; there is blue paint on your sleeve.
  • In another context: You've been painting; there is wood stain on your cuff.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Completed quantity

Use the perfect simple when the focus is on a completed quantity or number of achievements.

  • Example: The analyst has written six reports this quarter.
  • In another context: The data reviewer has written four audit reports this quarter.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Activity rather than product

Use the perfect continuous when the focus is on the activity or process rather than a completed product.

  • Example: The analyst has been writing the report all morning.
  • In another context: The policy researcher has been writing the assessment all morning.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Stative verb restriction

Stative meanings such as know and own generally favour the perfect simple. Dynamic senses of some traditionally 'stative' verbs can allow continuous forms.

  • Example: I have known Elena since university.
  • In another context: I have known Marta since university.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Repeated recent events

The perfect continuous can emphasise repeated activity over a recent period.

  • Example: Customers have been reporting the same error all week.
  • In another context: Applicants have been reporting the same error all week.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Long-term ongoing process

Use the perfect continuous to highlight an ongoing process that began in the past and is still developing.

  • Example: Researchers have been tracking the changes for more than a decade.
  • In another context: Researchers have been tracking the changes for a full decade.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Result vs duration

Both perfect simple and perfect continuous may be grammatical. Choose the simple to foreground an achieved result/quantity and the continuous to foreground duration, repetition or effort.

  • Example: We have solved three major issues since Monday.
  • In another context: We have solved five priority defects since Tuesday.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Temporary pattern

The perfect continuous often suggests a temporary pattern rather than a permanent state.

  • Example: I have been working from the regional office while our building is renovated.
  • In another context: I have been working from the satellite branch while our building is renovated.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

Past perfect continuous cause

Use the past perfect continuous when an earlier ongoing activity explains a later past result.

  • Example: The road was slippery because it had been raining all night.
  • In another context: The coastal highway was slippery because it had been raining all night.

C1 focus: Choose this form for the intended meaning and discourse effect; nearby alternatives may be grammatical but can change viewpoint, scope, time reference or register.

C1 takeaway

Do not ask only “Which form is grammatically possible?” Ask what the speaker is presenting as background or foreground, completed or ongoing, certain or tentative, generic or specific, neutral or emphatic. Advanced grammar is the control of those choices.

Exercises:
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3

Duration, repetition, temporary activity, visible results and the contrast between perfect simple and perfect continuous

1
Complete the sentence so that the duration of the unfinished activity is foregrounded: We the licensing agreement for nearly three hours, and we are only halfway through. (review)
2
Complete the sentence so that the recent activity explains the visible evidence: the engine; your hands are covered in grease. (repair)
3
The policy analyst eight briefing notes this month, and all eight have already been circulated. (draft)
4
The editor the annual report all morning, but the final section is still unfinished. (revise)
5
I Amira since our first year at university. (know)
6
Customers the same checkout error all week, and new tickets are still arriving. (report)
7
Researchers the glacier's movement for twelve years and intend to continue the study. (monitor)
8
Since Thursday, we all four critical discrepancies; none remain open. (resolve)
9
While our main office is being refurbished, I from the Riverside branch three days a week. (work)
10
The underpass was flooded because it heavily for several hours before dawn. (rain)

Duration, repetition, temporary activity, visible results and the contrast between perfect simple and perfect continuous

1
Choose the form that foregrounds the duration of an activity that is still unfinished: We the survey data for two hours, and we still have several sections left.
2
Choose the form that foregrounds recent activity as the explanation for visible evidence: the old floorboards; there is sawdust all over your sleeves.
3
Choose the form that foregrounds the completed quantity: The consultant six impact assessments this month; all six are now signed off.
4
Choose the form that foregrounds the activity rather than a finished product: Maya the proposal since breakfast, but the conclusion is still incomplete.
5
Choose the natural form for a continuing state: They the apartment since 2017.
6
Choose the form that foregrounds a repeated recent pattern that is still continuing: Clients about the same billing problem all week, and the calls are still coming in.
7
Choose the form that foregrounds an ongoing long-term process: Scientists changes in the coastline for more than a decade, and the project is continuing.
8
Choose the form that foregrounds the achieved result rather than the effort: Since Monday, the engineers all five faults identified in the inspection.
9
Choose the form that presents the arrangement as temporary and ongoing: While the city office is being renovated, I to the suburban branch instead.
10
Choose the form that presents an earlier ongoing activity as the cause of a later past result: The mountain roads were hazardous because it heavily throughout the night.

Duration, repetition, temporary activity, visible results and the contrast between perfect simple and perfect continuous

1
What does the continuous perfect foreground here?We have been examining the merger documents for most of the afternoon.
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B.
C.
2
Why is the continuous form especially natural in this context?You've been gardening; there is fresh soil on your knees and under your fingernails.
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B.
C.
3
Why is the perfect simple preferred here?The author has finished seven chapters so far, and all seven are ready for editing.
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B.
C.
4
What would change if has been rewriting were replaced by has rewritten?Leila has been rewriting the introduction all afternoon, but it still isn't finished.
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B.
C.
5
Why is the perfect simple natural with the highlighted verb?I have believed that explanation for years.
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B.
C.
6
What nuance does the continuous form add?Residents have been complaining about the night-time construction for weeks.
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B.
C.
7
Which interpretation best matches the highlighted form?The team has been observing the nesting site for nine years, and the study is continuing.
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B.
C.
8
Why is the perfect simple particularly appropriate?We have recovered all twelve missing files; nothing is still outstanding.
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B.
C.
9
What does the highlighted form suggest about the situation?I have been staying with my sister while my flat is being rewired.
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B.
C.
10
How does the highlighted form organise cause and time?The ceiling had discoloured because the pipe had been leaking for weeks.
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B.
C.