一般将来时四种表达——will、be going to、be doing、be about to 一次分清
引言
一般将来时不止 will 一种表达。初中阶段要掌握四种：will、be going to、be doing、be about to。考试经常考它们的区别。
这篇文章把一般将来时的完整用法和易错点整理出来。
四种将来表达
一、will + 动词原形 —— 临时决定、预测
```text
I will go.（我会去的。——临时决定）
```
```text
I will call you tonight.（我今晚给你打电话。）
否定：I won't call you.（won't = will not）
疑问：Will you call me?
```
二、be going to + 动词原形 —— 计划、迹象
```text
She is going to have a picnic this weekend.
（她这周末打算去野餐。——计划）
It is going to rain.（快要下雨了。——迹象）
```
```text
否定：I am not going to go.
疑问：Are you going to go?
```
三、be doing（进行时表将来）—— 安排好的动作
位移动词（come/go/leave/arrive 等）常用进行时表将来：
```text
We are leaving for Shanghai tomorrow.
（我们明天动身去上海。）
The train is arriving soon.（火车马上就到。）
```
四、be about to + 动词原形 —— 马上要做
```text
I am about to leave.（我正要走。）
The show is about to start.（演出马上开始。）
```
注意：be about to 后面不能加具体时间。
```text
错：I am about to leave at 8 o'clock.
对：I am leaving at 8 o'clock.
```
结构对比
```text
表达方式 意思 例子
will do 临时决定/预测 I will help you.
be going to do 计划/迹象 It's going to rain.
be doing 安排好的动作 We're leaving tomorrow.
be about to do 马上要做 The show is about to start.
```
高频易错点
易错点一：will 后面加动词原形
```text
错：I will going home.
对：I will go home.
```
易错点二：be going to 的 be 不能丢
```text
错：I going to buy a book.
对：I am going to buy a book.
```
易错点三：there be 的将来时
```text
There will be a meeting tomorrow.（明天有个会。）
注意：不能写 There will have。
```
总结
一般将来时四种表达：
```text
临时 will，打算 going to
安排 doing，马上 about to
```
```text
今日小抄：
will call 临时决定
is going to rain 有迹象
are leaving 安排好了
is about to start 马上开始
There will be 将会有
```