would do 是什么时态
would do 过去和将来时态都可以用；
例如
He just told me that he would go the party tonight.
他刚告诉我说他会去参加今天的聚会，这时候可以把would看成时will的过去时态。
一般将来时
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.
7．用法
[1]一般将来时常用来表示将来时间的动作或状况。
[2]一般将来时用于真实条件句和时间状语从句的.主句中表示将来的情况。如
I\'ll tell you as soon as he comes. 他一来我就告诉你。
[3] 用于条件状语从句表示愿望或意愿。如
If you will wait for me，I shall come back soon.
如果你愿意等我，我马上就回来。
[4]一般将来时可用来表示一种倾向或习惯性动作。如
The shop won\'t open until nine. 这家商店九点才会开门。
Children will be children. 孩子就是孩子。