I see a big cake. Is a book? He happy. It is elf. Is Sally happy __ sad? It is ___ ant Is ___ a good game? Is it ___cherry cake? can see a park. she cold?

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