Question

I shall remember your kindness forever

Answer 1

so what we have to do ???

Answer 2

★I sʜᴀʟʟ ᴀʟᴡᴀʏs ʀᴇᴍᴇᴍʙᴇʀ ᴛʜɪs ᴋɪɴᴅɴᴇss ᴏғ ʏᴏᴜʀs.

=> I shall remember this kindness of yours.

Here we have to change the sentence in negative sentence without changing the meaning.So ur answer is above.