1. 一般将来时

①将来发生的动作或存在的状态  Will + 动词原形，连用的时间状语  tomorrow, next week, in a few week, next Sunday, in + 一段时间

Will you back in 2 days?

② be going to  + 动词原形,计划打算，已经决定，很可能要做的事情

What are you going to do next week?

③be to + 动词原形,表示即将发生的动作

只能用will shall, 不用be going to 情况：

①表示带有意愿的色彩

We will help him if he asks us.

②表示客观性的将来

The sun will arise at 6:00 tomorrow morning.

1. 一般将来时

①将来发生的动作或存在的状态  Will + 动词原形，连用的时间状语  tomorrow, next week, in a few week, next Sunday, in + 一段时间

Will you back in 2 days?

② be going to  + 动词原形,计划打算，已经决定，很可能要做的事情

What are you going to do next week?

③be to + 动词原形,表示即将发生的动作

只能用will shall, 不用be going to 情况：

①表示带有意愿的色彩

We will help him if he asks us.

②表示客观性的将来

The sun will arise at 6:00 tomorrow morning.