1.Who did you mention to____ that it was too late. –wrong
2.Who did you mention it to _______that it was too late.
3.Who did you mention to ____about honeymoon?
(the first finding of Google search)
Analyzing the above sentences would I be correct in concluding that - in sentences with Clause Marker «That», stranding, which forms Gap in Indirect Object, cannot be used unless I have an overt Direct Object. In sentences with That I should choose Pied-piping instead.
- To whom did you mention that…
Thank you for any explanation!