英语中什么是主语第一人称？

一般现在时和现在进行时第一人称后的Be动词怎么用要牢记；

第一人称单数用 am ，

（For example）例如：

一般现在时-------

I am a teacher;

I am a doctor;

I am tired;

I am a boy;

I am a girl;

I am beautiful;

I am handsome;

I am 12 years old;

现在进行时-------

I am working;

I am running;

I am eating;

I am reading book;

I am talking;

I am thinking;

I am writing;

I am listening english;

I am singing;

I am performing;

第一人称复数用 are ，

（For example）例如：

一般现在时-------

We are teachers;

We are friends;

We are boys;

We are girls;

We are tall;

We are heavy;

现在进行时-------

We are working;

We are running;

We are eating;

We are reading book;

We are talking;

We are thinking;

We are writing;

We are listening english;

We are singing;

We are performing;

一般过去时和过去进行时第一人称后的Be动词怎么用要牢记；

第一人称单数用 was ，

（For example）例如：

一般过去时-------

I was a teacher ten years ago;

I was a doctor 8 years ago;

I was tired last night;

When I was young;

I was short 3 years ago;

I was 2 years old ten years ago;

过去进行时-------

I was working yesterday;

I was running the day before yesterday;

I was eating last night;

I was reading book last Wednesday morning;

I was talking last weekend;

I was thinking this morning;

I was writing yesterday;

I was listening english yesterday evening;

I was singing yesterday evening;

I was performing yesterday evening;

第一人称复数用 were ，

（For example）例如：

一般过去时-------

We were teachers ten years ago;

We were friends ten years ago;

We were young ten years ago;

We were students 5 years ago;

过去进行时-------

We were working yesterday;

We were running the day before yesterday;

We were eating last night;

We were reading book last Wednesday morning;

We were talking last weekend;

We were thinking this morning;

We were writing yesterday;

We were listening english yesterday evening;

We were singing yesterday evening;

We were performing yesterday evening;