à I need some corrections in these sentences. The first two ones are from a grammar book but the book gave the simple gerund as an answer and I think that without context my option could be right:

He denied having been driving (driving) so fast.

He denied having broken (breaking) into the shop.

Which is the difference between both options? Are both rights?

à What would you say: to leap into/ to. I wrote in a writing: “with this novel the author leaps to adult narrative” and the thing is that I handed out this piece of writing two times and the teacher corrected just in one of them writing leap into instead of leap to.

à How do you say the time after war? Post-war????

à In order to write with letters 19 do you write nineteenth?? (the teacher corrected it saying that it is not the right spelling but my computer accepts it!

These are OK:

He denied driving / having been driving so fast.
He denied breaking / having broken into the shop.

With this novel the author leaps into adult narrative.


19 = nineteen.
19th = nineteenth
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If I want to say 19th century, should I say nineteenth century? she corrected it but I pressume it is because it is not the correct way (I should have written it with numbers)
Either way is fine in my book, but I suppose it is clearer to use the figures: 19th century.