Improve the bracketed part of the sentence. If there is no improvement needed. Then choose 'No improvement'.
How long have you (being seating) on this bench?
1
been seating
2
been sitting
3
being sat
4
No substitution
Improve the bracketed part of the sentence. If there is no improvement needed. Then choose 'No improvement'.
How long have you (being seating) on this bench?