Porównaj poniższe pary zdań. Jaką formę mają konstrukcje to see / hear sb do sth, to make sb do sth oraz to help sb do sth w stronie biernej?
1a) Some students saw / heard George leave the building in a hurry.
1b) George was seen / heard to leave the building in a hurry.
2a) Unfortunately, Ms Perfect made me do the task again.
2b) Unfortunately, I was made to do the task again.
3a) They helped their teacher (to) clean up the chemistry lab.
3b) The teacher was helped to clean up the chemistry lab.