[ Past Perfect Continuous Tense ]
I … on the railway station waiting room for an hour before the train arrived.
- had been being sit
- had been sitting

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Passive Voice Tenses › View. What is the passive voice of ‘The students are taking the exam’?
A. The exam is being taken by the students.
B. The students are being taken by the exam.
C. The exam was taken by the students.
D. The students take the exam.
Grammar › View
My father uses laptop to_____
A. working
B. works
C. for work
D. work