Упражнение 272 на образование Past Perfect Continuous

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"have taken" —

"had taken" —

"has been taking" —

"had been taking" —

past perfect

present perfect

past perfect continuous

present perfect continuous

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Образование Past Perfect Continuous — справка

had been + infinitive + -ing

местоимение	вспом.глагол	инфинитив + ing
I you he she it we they	had been ('d been) had not been (hadn't been)	doing running working learning ...

местоимение

вспом.глагол

инфинитив + ing

I
you
he
she
it
we
they

had been
('d been)

had not been
(hadn't been)

doing
running
working
learning
...