Share C1 Advanced Present Perfect and Past Forms
Save to Folder
She realized that her research team _____ on the incorrect dataset for days before the statistical error was discovered.
had been working
was worked
works
has worked
The structural engineering firm _____ the durability of high-density materials since the construction project began last spring.
had tested
was testing
has been testing
tested
The archaeologists discovered that the ancient manuscript _____ in a sealed airtight chamber for centuries.
had been preserving
was preserving
has been preserved
had been preserved
The lead investigator realized mid-interview that the suspect _____ about his whereabouts all along.
had been lying
lies
was lied
has lied
She abruptly turned off the computer because a suspicious network error message _____ twice already.
has been appearing
had appeared
was appearing
appears
Our research division _____ five comprehensive reports on climate resilience since funding commenced in 2022.
was published
had been publishing
published
has published
The author finally submitted her manuscript yesterday after she _____ the final chapter three times.
painstakingly rewrites
had painstakingly rewritten
was painstakingly rewriting
has painstakingly rewritten
He _____ any official notification from the admissions department regarding his application status yet.
has not received
had not been receiving
did not receive
was not received
The legal firm took on the complex case only after senior partners _____ all potential conflict risks.
have evaluated
were evaluating
evaluate
had evaluated
They _____ for a suitable investment property for almost a year before finding this off-market commercial lot.
search
were searched
had been searching
have searched
The regional director _____ the execution of over twenty infrastructure projects since taking office last January.
oversaw
had been overseeing
has overseen
was overseen
The defense attorney argued that his client _____ in his office when the incident took place.
was worked
has worked
had been working
works
The scientific panel published their findings only after peer reviewers _____ the absolute validity of the empirical data.
had confirmed
confirm
have confirmed
were confirming
She _____ the draft contract when her colleague called to inform her of the sudden policy alteration.
has carefully reviewed
had been carefully reviewed
carefully reviews
was carefully reviewing
The flight crew _____ the severe weather system long before air traffic control issued the compulsory rerouting order.
had been monitoring
monitor
have monitored
were monitored
He realized he lost his security clearance badge only after he _____ through his entire briefcase twice.
was searching
searches
had searched
has been searching
