do是什么时态的单词

1．概念：表示将要发生的.动作或存在的状态及打算、计划或准备做某事。

2．时间状语：tomorrow，next day(week，month，year…)，soon，in a few minutes，by…，the day after tomorrow，etc.

3．基本结构：主语+am/is/are+going to + do；will/shall + do.

4．否定形式：am/is/are not going to do ；will/shall not do。

5．一般疑问句：be放于句首；will/shall提到句首。

6．例句：They are going to have a competition with us in studies.

It is going to rain.