be going todo是什么意思？
be going to表达“打算，计划，有意做某事”。
其肯定句形式为主语+be（am/is/are）going to+动词原型。否定句形式为主语+be not going to+动词原型。一般疑问句形式为be+主语+going to do sth。特殊疑问句形式为疑问词+be+主语+going to do sth。
一、肯定句：be（am/is/are）going to+动词原型
1、I am going to help with the housework.我要帮忙做家务。
2、He/She/It is going to help with the housework.TA要帮忙做家务。
3、You/They/We are going to help with the housework.你们/他们/我们要帮忙做家务。
二、否定句：主语+be not going to+动词原型
1、I am not going to see a movie.我不想去看电影。
2、He/She/It isn’t going to see a movie.TA不想去看电影。
3、You/We/They aren’t going to see a movie.你们/我们/他们不想去看电影。
三、一般疑问句：be+主语+going to do sth.
1、-Am I going to do sth.？-Yes,I am./No,I’m not.
2、-Is he/she/it going to do sth.？-Yes,he is./No,she isn’t.
3、-Are you/we/they going to do sth.？-Yes,you are./No,you aren’t.
例如：-Are you going to check your email？-Yes,I am.
四、特殊疑问句：特殊疑问词+be+主语+going to do sth.
1、时间：When
2、地点：Where
3、人物：Who
4、事情：What
5、原因：Why
例如：When are they going to have a picnic?他们什么时候去野餐？
