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[영어]

당신의 책을 보게 된게 얼마나 감사한일인지...

이런 뉘앙스로 표현하고자 해요

how grateful I read your book   이렇게 하면 될까요?

[...]

How grateful it is to have read your book.
I feel so grateful reading your book.

이정도가 아닐까요?

[민들레홀씨]

how grateful I am for having read your book.으로 하시거나..
I can not thank you enough how grateful I'm for having read your book 표현도 생각해보세요.

[..]

How much I appreciate what I have read your book.

[..]

I feel great to read your book.