The structure of past continuous?

The past continuous tense is formed by using the past tense of the verb "to be" (was/were) and adding the present participle (-ing form) of the main verb.

The basic structure of the past continuous tense is:

Subject + was/were + present participle

For example:
- I was studying for my exam.
- She was cooking dinner when the phone rang.
- They were playing soccer in the park.

In negative sentences, "not" is placed after "was" or "were":
- I was not watching TV last night.
- She was not working on the project at that time.

In questions, the subject and "was" or "were" are inverted:
- Were you sleeping when I called?
- Was he studying when you arrived?

Overall, the past continuous tense is used to describe actions that were in progress at a specific point in the past.

Subject + was/were + present participle (-ing form of the verb)