（英文）一般现在时的结构？？？

Question

如题所述

Answer 1

一般现在时
用法：
A) 表示现在发生的动作、情况、状态和特征。
B) 习惯用语。
C) 经常性、习惯性动作。
例：He always helps others. （他总是帮助别人。）
D) 客观事实和普遍真理。尤其要注意，如果前后文不是一般现在时，则无法保持 主句、从句时态一致。
E) 表示一个按规定、计划或安排要发生的动作，（仅限于某些表示“来、去、动 、停、开始、结束、继续”等的动词 ）可以与表示未来时间的状语搭配使用 。常见的用法是：飞机、火车、轮船、汽车等定期定点运行的交通方式。
例：The next train leaves at 3 o'clock this afternoon.
（下一趟火车今天下午3点开车。）
How often does this shuttle bus run? （这班车多久一趟？）
F) 在时间和条件状语从句里经常用一般现在（有时也用现在完成时）表示将来事 情。
例：When you have finished the report, I will have waited for about 3 hours.（等你完成这份报告的时候，我就已经等了将近3个小时了。）

Answer 2

I do Do I do...? I don't do ...
You do Do you do...? You don't do...
He/She/It does Does he/she/it do...? He/She/It doesn't do...
We do Do we do...? We don't do...
You do Do you do ...? You don't do...
They do Do they do...? They don't do...
I am... Am I ...? I am not...
You are... Are you...? You are not...
He/She/It is... Is he/she/it...? He/She/It isn't...
We are... Are we...? We are not...
You are... Are you...? You aren't...
They are... Are they...? They aren't ...