Was is the past form of the verb 'be' for 'I', 'he', 'she', and 'it'. We use it to talk about a past state or condition.
She was at school yesterday.
I was happy last week.
Was helps form the past continuous tense. It shows that an action was happening at a specific time in the past.
He was running in the park.
I was eating dinner at six.
Was shows something was true or existed in the past, but may not be true or exist now.
There was a big tree here.
It was cold yesterday.
Was is used in reported speech to tell about what someone felt or thought in the past.
She said she was tired.
He thought it was a good idea.
Was can describe something that happened or existed in the past as part of a known phrase or fixed expression.
He was once a great player.
It was the best day of my life.
In casual speech, 'was' often simply refers to something great or memorable from the past in an informal way.
The party was so fun!
That movie was awesome.
Was is used in conditional sentences to talk about unreal or imaginary past situations, though 'were' is often preferred in formal English.
If I was rich, I would travel.
He acted as if he was the boss.
