What is the auxiliary verb used for all subjects in the Past Perfect Continuous?
Về câu hỏi này
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Chi tiết câu hỏi
What is the auxiliary verb used for all subjects in the Past Perfect Continuous?
A
had
B
has
C
have
D
did
Câu hỏi liên quan
- What is the correct affirmative structure of the Past Perfect Continuous?
- Which of these is the correct negative form of I had been working ?
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- Which preposition is used with a period of time (e.g., three hours) in this tense?
- Which phrase is common when describing an action that lasted the entire duration of a past time?
- Why do we use the Past Perfect Continuous in: I was tired because I had been working ?