There are 9 parts of speech or word classes in English language:
– nouns
– pronouns
– determiners
– verbs
– prepositions
– adjectives
– adverbs
– conjunctions
– interjections

Tense is a variation in the form of English verbs based on:
– the subject of the sentence
– time
– context of actions/events

Examples (variations based on time):
– I eat fried rice every day.
– I ate fried rice this morning.
– I will eat fried rice tomorrow.
– I am eating fried rice now.
– I have just eaten fried rice.
– I have been eating fried rice this whole week.

Examples (variations based on subject):
– I eat fried rice every day.
– He eats fried rice every day.
– She eats fried rice every day.
– My cat eats fried rice every day.
– You eat fried rice every day.
– We eat fried rice every day.
– They eat fried rice every day.

1. An action that was happening at one point of time in the past.
– I was working at 10pm last night.
– At 8pm last night, my mother was watching TV at home.
– She was cooking when I called her yesterday.

There are 5 verb forms:
– base form
– past simple form
– past participle form
– -ing form (present participle form)
– -s form

In Past Continuous Tense, we use these forms:
– -ing forms

We Do NOT use these forms in Past Continuous:
– base forms
– -s forms
– past simple
– past participle

Positive Sentences

I + was + -ing form
-> I was eating breakfast.
You + were + -ing form
-> You were eating breakfast.
We + were + -ing form
-> We were eating breakfast.
They + were + -ing form
-> They were eating breakfast.

He + was + -ing form
-> He was eating breakfast.
She + was + -ing form
-> She was eating breakfast.
It + was + -ing form
-> My cat was eating breakfast.

Negative Sentences

I + was not + -ing form
-> I wasn’t eating breakfast.
You + were not + -ing form
-> You weren’t eating breakfast.
We + were not + -ing form
-> We weren’t eating breakfast.
They + were not + -ing form
-> They weren’t eating breakfast.

He + was not + -ing form
-> He wasn’t eating breakfast.
She + was not + -ing form
-> She wasn’t eating breakfast.
It + was not + -ing form
-> My cat wasn’t eating breakfast.

Yes/No Questions

Was + I + -ing form
-> Was I eating breakfast?
Yes, you were. / No, you weren’t
Were + You + -ing form
-> Were you eating breakfast?
Yes, I was. / No, I wasn’t
Were + We + -ing form
-> Were we eating breakfast?
Yes, we were. / No, we weren’t
Were + They + -ing form
-> Were they eating breakfast?
Yes, they were. / No, they weren’t

Was + He + -ing form
-> Was he eating breakfast?
Yes, he was. / No, he wasn’t
Was + She + -ing form
-> Was she eating breakfast?
Yes, she was. / No, she wasn’t
Was + It + -ing form
-> Was my cat eating breakfast?
Yes, it was. / No, it wasn’t

Questions with Question Words (QW)

QW + Was + I + -ing form
-> Why was I crying?
QW + Were + You + -ing form
-> What were you eating?
QW + Were + We + -ing form
-> What were we doing?
QW + Were + They + -ing form
-> What were they playing?

QW + Was + He + -ing form
-> Who was he talking to?
QW + Was + She + -ing form
-> Why was she crying?
QW + Was + It + -ing form
-> What was your cat eating?