1.the posters for the protection of the environment (designed) by the students of PM junior high school have just been put up all over the school
2.the building was completely (destroyed) by the fire
3.the little boy has repeatedly denied (breaking) the window
4.she was disappointed (not to be nominated) as the best student in my school
5.margaret had a hard time (learning) how to spell spanish
6.it was a beautiful day and sandra was lying under a tree (to listen) to the birds sing
7. mrs. jackson had warned her young son (not to touch) the hot stove