1、肯定句：主语+动词 (注意人称变化) +其它成分
eg. I like eat ice cream.
2、否定句：主语+助动词(do/does) + not +动词原形+其它成分
eg. We don't like eat beef.
3、一般疑问句：
A.行为动词的一般疑问句：助动词(do/does)+主语+动词原形 + 其它成分
you like it?
B. be动词的一般疑问句：Am / Is /Are +主语 + 其它成分
eg. Are they your children?
4、特殊疑问句：特殊疑问词 + 一般疑问句
eg. How many students are there in your school?
When are you go to London?
