1.You should brush your teeth after meals.
→Brush your teeth after meals!
2. You should not play soccer in the street.
→Don't play soccer in the street!
3. You should wash and iron your own clothes.
→Wash and iron your own clothes!
4. You should not eat too much candy.
→Don't eat too much candy!
5. You should wash your hands before meals.
→Wash your hands before meals!
6. You should not worry about the examination.
→Don't worry about the examination!
7. You should tidy your room every day.
→Tidy your room everyday!
8. You should not forget to write to your parents.
→Don' t forget to write to your parents!
E,
1,do→did
2,teach→taught
3,send→sent
4,spend→spent
5,begin→began
6,cut→cut
7,put→put
8,give→gave
9,write→wrote
10,be→was/were
11,buy→bought
12,have→had
13,take→took
14,go→went
15,make→made
16,think→thought
17,see→saw
18,eat→ate
19,sing→sang
20,wear→wore
