Read and observe(观察) Don’t smoke! Don’t play football! Don’t park your car! Please don’t eat! Don’t pick the flowers! 14
Draw the conclusion (得出结论) 祈使句的结构如下: 肯定:(Please) + do sth. 否定:(Please) + Don’t do sth. 15
祈使句的句型: 肯 定 否 定 Be quiet. 1. 动词+… Please have a seat. 2. Please+动词… David, pay attention. 3. 人名+动词… Don’t be afraid. Please do not make a noise. Alan, don’t be late. 在动词前 面加don’t 否定 17
in class in the restaurant on the road 1. Be quiet. 2. Take notes. 1. Line up. 1. Walk on the zebra crossing. 2. Don’t push. 3. Don’t make 2. Be careful. 3. Listen to the 3. Don’t play teacher carefully. noise. football. 4. Don’t waste food. 4. Don’t eat in 4. Don’t run fast. class. …… ……. …… 18