#2 - must be
#3 - shouldn't
#4 - can't
#5 - couldn't
#6 - can
#7 - doesn't have to
#8 - should
#9 - must have been
#10 - could
#11 - should
#12 - can't
#13 - don't have to
#14 - should
#15 - coudn't
#16 - can't
#17 - must be
#18 - should
#2 - must be
#3 - shouldn't
#4 - can't
#5 - couldn't
#6 - can
#7 - doesn't have to
#8 - should
#9 - must have been
#10 - could
#11 - should
#12 - can't
#13 - don't have to
#14 - should
#15 - coudn't
#16 - can't
#17 - must be
#18 - should