Which of these is the correct negative form of I had been working ?
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This question belongs to "Thì quá khứ hoàn thành tiếp diễn – Past Perfect Continuous" on Học Mỗi Ngày. Review the answer, solution, and related items in the same set to study more effectively.
Question detail
Which of these is the correct negative form of 'I had been working'?
A
I hadn't been working
B
I had been not working
C
I not had been working
D
I didn't had been working
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