you mustn't
walk on the grass
you must
put rubbish in the bin
you must
go to school
you mustn't
climb a tree
you mustn't
drink a lot of water
you mustn't
park here
you mustn't
make a loud noise
you mustn't
make a loud noise
you mustn't
climb a tree
you must
do homework
you must
put rubbish in the bin
you must
drink a lot of water