do是什麼時態的單詞

1．概念：表示將要發生的.動作或存在的狀態及打算、計劃或準備做某事。

2．時間狀語：tomorrow，next day(week，month，year…)，soon，in a few minutes，by…，the day after tomorrow，etc.

3．基本結構：主語+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。

5．一般疑問句：be放於句首；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.