Present Simple "to be" - Subject Pronouns

Grammar

1. Personal Pronouns

Personal pronouns tell which person or thing we are speaking about.
The personal pronouns in English are:

Singular I You He She It

Plural We You They

2. Verb "to be"

The verb "be" means to exist.

It is a linking verb, it links a subject and a thing connected with that subject. 
The present simple forms of "to be" are as follow:

Singular I am You are He is She is It is

Plural We are You are They are

3. First Sentences

English is a Subject-Verb-Object (SVO) language - meaning that sentences are made with the subject first, then the verb, and finally the object. Using the above grammar we can now make basic English sentences, for example: 
- I am a teacher 
- She is happy 
- They are students

Languages like French and Chinese are also SVO languages, but other languages are different. For example, Japanese, Korean and Persian are Subject-Object-Verb languages, so you wouldn't say "She is happy", you'd say "She happy is"!