说明事实或陈述说话人观点的句子。基本结构：主语＋谓语＋其他
1）肯定陈述句 We all like pandas very much.
2）否定陈述句 He doesn’t do housework at weekends.
3）肯定陈述句改否定陈述句
①一般是在be动词或情态动词后加not。
Mary was at school yesterday. —> Mary was not at school yesterday.
I can make a model plane. —>I can not make a model plane.
②不含be动词或情态动词的，行为动词前要用助动词的否定式（don’t，doesn’t，didn’t），后面跟动词的原形。
He likes drawing pictures.—>He doesn’t like drawing pictures.
I went to the park yesterday. —>I didn’t go to the park yesterday.
4）陈述句改一般疑问句
①有be动词或情态动词的，把be动词或情态动词提前。
Mary was at school yesterday. —> Was Mary at school yesterday?
I can make a model plane. —> Can you make a model plane?
②不含be动词或情态动词的句子，借助助动词do,does,did,have,had,has开头，动词还原成原形。
He likes drawing pictures.—>Does he like drawing pictures.
I went to the park yesterday. —>Did you go to the park yesterday?
。