ESSENTIAL
1) What is essential for this job?
2) It is essential for us that you stay where you are.

DRAW THE CURTAINS
1) Draw the curtains!
2) It was dark so I drew the curtains.

CHEAT SHEET
1) You shouldn´t use a cheat sheet, it´s dishonest.
2) I´ve just written a cheat sheet.

TEACHER´S PET
1) Do you think (that) I´m the teacher´s pet?
2) Are you a teacher´s pet? Look at this site and you find it out right away.