Tom can't improve his first book.Tom can't ____ his first book. (improve / improve on)
what's the difference between them?
Thank you in advance.
I'm afraid I can't improve on Panjandrum's answer. It says it all...Tom can't improve his first book.
That is not surprising. Tom's first book has, we assume, been printed and published. Nothing Tom can do now could possibly change it.
Tom can't improve on his first book.
This suggests that Tom is writing another book.
There are at least two possible meanings:
1> Tom is having difficulty writing his second book and none of his attempts so far have been better than his first book (which might have been dreadful).
2> Tom's first book was so great that it is hard to imagine how he could possibly do better.