2 Find the incorrect sentences.
a. We mustn't be late for the lecture.
b. You must lose some weight.
c. Caroline doesn't have to work on Saturdays.
d. You mustn't go now but you can if you want to.
e. Mark hasn't to worry about the exam-he's done lots of work.
f. You don't have to stay out later than ten. That's when they lock the door.
g. You needn't drink water from the river: it's dirty.
h. Relax! We mustn't leave till ten o'clock.
i. You have to leave your bags at the desk.
j. You'll must find a job very soon.
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