Present perfect tense​

1. how can i help you?

2. do you have warm mittens?

3. of course. do you have white and blue scarves?

4. how much does it cost?

to do a crossword 

a crossword is done

is a crosswod done?

a crossword is not done

to read a book

a book is read

is a book read?

is  the book written?  

a book is not read

to recite a poem

a poem is recited

is a poem recited?

если надо поменять время, то принцип тот же