Present Perfect
Your email/not arrive(yet)
You/make/ Sara's birthday cake/? (Yet)

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

1)i have to work hard to improve my english

2)joan doesn’t   have to go.she can stay here.

3)i’m   sorry   i’m late.i had to do the shopping.

4)i think the spacemen has known english.

5)does she have to read this rule?

6)tom doesn’t  have to use a computer.

7)you have to know english to understand people.

8)does mary have to help ann to study english?

9)what time do you have to get up?

10)has your teacher corrected your homework?  

если нужно использовать только формулу " i  " , то:

i can build a farmhouse.

i can go across the bridge.

i can dig in the garden.

i can ride a horse.