I. MUST
1. We must help parent at home.
2. I must do homework to parent happy.
3. I must wash he dishes help parent.
4. I must cook rice to help parent.
5. I must cleanning house to help parent.
II.MUSTN'T
1. We mustn't lazy.
2. I mustn't against parent.
3. I mustn't mess.
4. I mustn't require.
5. I mustn't selfish.
Study well!!!!
$@Soccuksuk$