Используйте Present Perfect Continuous для выполнения предложений.
It’s seven pm. I (wash) the dishes since six pm.
We (work) since morning.
Dad (watch) TV.
Sarah (cook) dinner for two hours.
The book is difficult to read. I (read) it for a month.
They (sleep) for 10 hours!
Her eyes were red. It was clear she (cry).
Mr. Thompson (wait) for 3 hours.
I (do) my homework since seven o’clock.
The teacher (examine) all the students for 4 hours.
It (rain) for several days.
Liz (paint) in her room since morning.
Alec (stand) there since 6 o’clock.
Sam (study) French for 5 years.

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I have been washing the dishes since six pm.
We have been working since morning.
Dad has been watching TV.
Sarah has been cooking dinner for two hours.
The book is difficult to read. I have been reading it for a month.
They have been sleeping for 10 hours!
Her eyes were red. It was clear she has been crying.
Mr. Thompson has been waiting for 3 hours.
I have been doing my homework since seven o’clock.
The teacher has been examining all the students for 4 hours.
It has been raining for several days.
Liz has been painting in her room since morning.
Alec has been standing there since 6 o’clock.
Sam has been studying French for 5 years.