During reading the book, I fell asleep.
I think "while" is more suitable but I want to know if it is grammatically correct to use "during" here. If it is possible, is there any difference?
During reading the book, I fell asleep.
I think "while" is more suitable but I want to know if it is grammatically correct to use "during" here. If it is possible, is there any difference?
That's not a gerund, it's the present participle. For the present participle, you should use "while". For it to be a gerund, it needs a determiner: "During my reading the book, I fell asleep." That's a bit awkward, but grammatically correct.