1. Change the imperative sentences into more polite expressions beginning with "Do you mind if..."

2. When I say a sentence, you should say a more polite sentence beginning with 'Do you mind..."

3. _________________________________

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Are they grammatical? Do you have better sentences?

1 answer

1 is fine.

2 is a little confusing because of the shift from "I" to "you." I'd just skip the first part and start with the word "You ... "

Other ways to soften the imperative --
"Would you please ... ?"
"Please make sure you ... "
or simply "Please ... "